random number generator laravel

Text and Paragraphs
Date and Time
Miscellaneous
ORM Integration
Third-Party Libraries

Numbers and Strings #

Randomdigit #.

Generates a random integer from 0 until 9.

randomDigitNot #

Generates a random integer from 0 until 9, excluding a given number.

randomDigitNotNull #

Generates a random integer from 1 until 9.

randomNumber #

Generates a random integer, containing between 0 and $nbDigits amount of digits. When the $strict parameter is true , it will only return integers with $nbDigits amount of digits.

randomFloat #

Generates a random float. Optionally it's possible to specify the amount of decimals.

The second and third parameters optionally specify a lower and upper bound respectively.

numberBetween #

Generates a random integer between $min and $max . By default, an integer is generated between 0 and 2,147,483,647 (32-bit integer).

randomLetter #

Generates a random character from the alphabet.

randomElements #

Returns $count amount of random element from the given array, traversable, or enum. By default, the $count parameter is set to 1, when null a random number of elements is returned.

randomElement #

Returns a random element from the given array, traversable, or enum.

randomKey #

Returns a random key from the given array.

Returns a shuffled version of either an array or string.

Generate a string where all # characters are replaced by digits between 0 and 9. By default, ### is used as input.

Generate a string where all ? characters are replaces with a random letter from the Latin alphabet. By default, ???? is used as input.

Generate a string where ? characters are replaced with a random letter, and # characters are replaces with a random digit between 0 and 10. By default, ## ?? is used as input.

Generate a string where * characters are replaced with a random character from the ASCII table. By default, **** is used as input.

Generate a random string based on a regex. By default, an empty string is used as input.

How to Generate Random Unique Number in Laravel?

Now, let's see tutorial of generate 6 digit random number in laravel. i would like to show you how to generate 6 digit random number in laravel. if you have question about laravel generate random 6 digit number then i will give simple example with solution. you will learn how to generate random unique number in laravel.

In this post, i will give you two example where you can generate 4, 6, 8, 10 digit random number with laravel and you can learn how to generate random unique number in laravel. you can also use this example with laravel 6, laravel 7, laravel 8, laravel 9 and laravel 10 version.

let's see both example:

Example 1: 6 Digit Random Code

namespace App\Http\Controllers;

class ITSController extends Controller

* Write code on Method

* @return response()

public function index()

$randomNumber = random_int(100000, 999999);

dd($randomNumber);

Example 2: Random Unique Number

use App\Models\Product;

'name' => 'Silver',

'price' => 100,

'code' => $this->generateUniqueCode()

$product = Product::create($input);

dd($product);

public function generateUniqueCode()

$code = random_int(100000, 999999);

} while (Product::where("code", "=", $code)->first());

return $code;

[name] => Silver

[price] => 100

[code] => 586955

[updated_at] => 2021-05-20T13:57:29.000000Z

[created_at] => 2021-05-20T13:57:29.000000Z

[id] => 101

now you can check from your end.

i hope it can help you...

Hardik Savani

I'm a full-stack developer, entrepreneur and owner of Aatman Infotech. I live in India and I love to write tutorials and tips that can help to other artisan. I am a big fan of PHP, Laravel, Angular, Vue, Node, Javascript, JQuery, Codeigniter and Bootstrap from the early stage. I believe in Hardworking and Consistency.

We are Recommending you

Laravel 8 Barcode Generator Example
Laravel 8 QR Code Generate Example
How to Generate PDF and Send Email in Laravel?
How to Create Custom Helper Function in Laravel 7?
How to Check if String Contains Specific Word in Laravel?
How to Generate UUID in Laravel?
How to get Keys from Array in PHP Laravel?
Laravel Redirect to URL using redirect() Helper
How to Generate Random Unique String in Laravel?
Laravel - Generate Captcha code and Validation example using BotDetect package
How to Generate Random Alphanumeric String in PHP?

Latest Posts

Laravel Send Welcome Email After Registration Example
Laravel Migration Remove Auto Increment Example
How to Add Primary Key in Laravel Migration?
Gaming PCs vs Gaming Consoles – What is Better?
How to Add Unique Constraint in Laravel Migration?

Tutorials Maker

Laravel Generate 4,6,8,10 Digit Unique Random Number Example

Generate 4,6,8,10 digit unique random number in laravel. In this tutorial, you will learn how to generate 2,4,6,10,12 digit unique random number in PHP laravel.

Generate 4,6,8,10 Digit Unique Random Number in PHP Laravel

You can use the random_int() function to generate 2,4,6,10, digit unique random number in PHP Laravel.

First of all, you need to know about php random_int() function. As shown following:

rand_int() function

The PHP random_int() is inbuilt PHP function. Which is used to generate a random integer number.

The basic syntax of random_int() function is following:

Parameters of random_int() function

min:- This a first parameter of this function and it is optional. Specifies the minimum/smallest/lowest number to be returned. Default is 0
max:- This a second parameter of this function and it is also optional. Specifies the maximum/largest/highest number to be returned.

Generate 4 digit unique random number in laravel

You can use the following example to generate 4 digit unique random number in laravel:

Generate 6 digit unique random number in laravel

You can use the following example to generate 6 digit unique random number in laravel:

Author Admin

My name is Devendra Dode. I am a full-stack developer, entrepreneur, and owner of Tutsmake.com. I like writing tutorials and tips that can help other developers. I share tutorials of PHP, Python, Javascript, JQuery, Laravel, Livewire, Codeigniter, Node JS, Express JS, Vue JS, Angular JS, React Js, MySQL, MongoDB, REST APIs, Windows, Xampp, Linux, Ubuntu, Amazon AWS, Composer, SEO, WordPress, SSL and Bootstrap from a starting stage. As well as demo example.

View all posts by Admin

Generate Unique Random Numbers in Laravel

# Laravel Tips

Table of contents

If you thinking about how to generate unique random numbers in Laravel from your database this. Then this post could help you to do that. For example, if you have an item that generates a random number but is unique. So to do that we need to generate the random numbers the check to our database if exists if not then use the generated number.

Here is the code that can generate random and unique numbers.

As you can see it will not stop until the number generated is not unique using do while statement.

Then in your controller for storing new tickets let's call the ticket_number function that generates the unique numbers.

That's it I hope it helps :)

Combine the Nwidart Laravel Modules Assets to Public using Laravel Mix 2 years ago 1 minute to read
Laravel 9 Auth Login and Registration with Username or Email 2 years ago 17 minutes to read
How To Add Remember Me Functionality To Your Laravel 9 Login? 2 years ago 2 minutes to read
How To Implement Remember Me with Custom Expiration To Your Laravel 8 Login? 2 years ago 2 minutes to read
Laravel 9 Logout For Your Authenticated User 2 years ago less than a minute to read
How To Implement Laravel 9 Email Verification? 2 years ago 5 minutes to read
How To Change The Laravel Redirect URL When Not Authenticated? 2 years ago less than a minute to read
How To Queue the Laravel 9 Email Verification? 2 years ago 1 minute to read

How to generate random numbers from a pool of numbers in Laravel

Grokking the Behavioral Interview

Many candidates are rejected or down-leveled in technical interviews due to poor performance in behavioral or cultural fit interviews. Ace your interviews with this free course, where you will practice confidently tackling behavioral interview questions.

In this shot, we will learn how to generate numbers from a pool with the random() method.

What is the random() method?

The random() method is a Laravel array method that helps select random numbers from an array.

The random() method takes two parameters:

An array that contains numbers.
The number of random numbers you want.

Example explained

Don’t forget to import the Illuminate\Support\Arr; class.

＄arr can be from your database, or you can manually set it like the example above. You then pass ＄arr to the random() method as the first parameter, as well as the number of random numbers you want as output. For the random() method to work, we have to call it on the Arr facade, which helps manipulate arrays.

While outputting more than one number, the random() method outputs an array.

For example, output= [3,4];.

RELATED TAGS

CONTRIBUTOR

Learn in-demand tech skills in half the time

Skill Assessments

For Individuals

Cookie Policy

Business Terms of Service

Data Processing Agreement

Become an Author

Become an Affiliate

Frequently Asked Questions

GitHub Students Scholarship

Course Catalog

Early Access Courses

Earn Referral Credits

Search code, repositories, users, issues, pull requests...

Provide feedback.

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly.

To see all available qualifiers, see our documentation .

Notifications

A handy package to generate a secure unique random number for a model

Licenses found

Creativecrafts/laravel-secure-random-number-generator, name already in use.

Use Git or checkout with SVN using the web URL.

Work fast with our official CLI. Learn more about the CLI .

Open with GitHub Desktop
Download ZIP

Sign In Required

Please sign in to use Codespaces.

Launching GitHub Desktop

If nothing happens, download GitHub Desktop and try again.

Launching Xcode

If nothing happens, download Xcode and try again.

Launching Visual Studio Code

Your codespace will open once ready.

There was a problem preparing your codespace, please try again.

Latest commit

Laravel-secure-random-number-generator.

A handy package to generate a secure unique random number for a model.

Installation

You can install the package via composer:

You can publish the config file with:

This is the contents of the published config file:

Please see CHANGELOG for more information on what has changed recently.

Contributing

Please see CONTRIBUTING for details.

Security Vulnerabilities

Please review our security policy on how to report security vulnerabilities.

Godspower Oduose
All Contributors

The MIT License (MIT). Please see License File for more information.

Contributors 3

Function Reference
Other Basic Extensions
Random Functions

(PHP 4, PHP 5, PHP 7, PHP 8)

rand — Generate a random integer

Description

If called without the optional min , max arguments rand() returns a pseudo-random integer between 0 and getrandmax() . If you want a random number between 5 and 15 (inclusive), for example, use rand(5, 15) .

This function does not generate cryptographically secure values, and must not be used for cryptographic purposes, or purposes that require returned values to be unguessable.

If cryptographically secure randomness is required, the Random\Randomizer may be used with the Random\Engine\Secure engine. For simple use cases, the random_int() and random_bytes() functions provide a convenient and secure API that is backed by the operating system’s CSPRNG .

Note : On some platforms (such as Windows), getrandmax() is only 32767. If you require a range larger than 32767, specifying min and max will allow you to create a range larger than this, or consider using mt_rand() instead.

Note : As of PHP 7.1.0, rand() uses the same random number generator as mt_rand() . To preserve backwards compatibility rand() allows max to be smaller than min as opposed to returning false as mt_rand() .

The lowest value to return (default: 0)

The highest value to return (default: getrandmax() )

Return Values

A pseudo random value between min (or 0) and max (or getrandmax() , inclusive).

Example #1 rand() example

The above example will output something similar to:

min max range must be within the range getrandmax() . i.e. ( max - min ) <= getrandmax() Otherwise, rand() may return poor-quality random numbers.

srand() - Seed the random number generator
getrandmax() - Show largest possible random value
mt_rand() - Generate a random value via the Mersenne Twister Random Number Generator
random_int() - Get a cryptographically secure, uniformly selected integer
random_bytes() - Get cryptographically secure random bytes

User Contributed Notes 4 notes

600+ Laravel Articles

Generate Unique Random Number And String In Laravel

Hello Artisan in this quick example i will show you how you can generate unique random number and string in Laravel application. We need unique number or unique string for our application sometimes.

Like when you create a ecommerce website we need a unique sq number or unique product number. So in this example we will see several string helper that way we can use it easily like str_limit, str_plural, str_finish, str_singular etc.

If we need to generate unique random string then you can use str_random() helper of Laravel. It is very simple and we can use easily.

See the below example to create a random string in Laravel:

In this laravel generate unique code example, i will give you two example where you can generate 4, 6, 8, 10 digit random number in laravel and your php based application.

From this example you can learn how to generate random unique number in laravel. Let's see the below example of generate unique random number of Laravel:

Read also : Some Artisan Commands to Speed Up Laravel Application

Hope it can help you to generate unique number and string in your php Laravel application.

PHP Tutorial

Php advanced, mysql database, php examples, php reference, php rand() function.

❮ PHP Math Reference

Generate random numbers:

Definition and Usage

The rand() function generates a random integer.

Example tip: If you want a random integer between 10 and 100 (inclusive), use rand (10,100).

Tip: As of PHP 7.1, the rand() function has been an alias of the mt_rand() function.

Parameter Values

Technical details.

COLOR PICKER

Report Error

If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:

[email protected]

Thank You For Helping Us!

Your message has been sent to W3Schools.

Laravel 10 - How to Generate Fake Data with Laravel's Faker Library

May 01, 2023
Article · 3 min
Share profile in a message
Save your profile to PDF
Lock profile
Profile settings
Favorite (0)

Hello Artisan, today I'll show you how to generate fake data using faker. Laravel's Faker library provides a simple way to generate fake data for your application. It can be used to generate fake names, addresses, phone numbers, dates, and much more. So, let's see how we can easily create a set of fake data in our application.

Note: Tested on Laravel 10.8

Usage of faker library.

Faker can be useful for testing and development, or for creating sample data to show to clients or stakeholders. Let's see how we can easily create fake data. Faker give us the multiple helpful methods for generating the fake data. Let's see the available method first.

name() : Generates a random name.
firstName() : Generates a random first name.
lastName() : Generates a random last name.
email() : Generates a random email address.
password() : Generates a random password.
phoneNumber() : Generates a random phone number.
address() : Generates a random address.
city() : Generates a random city name.
state() : Generates a random state name.
postcode() : Generates a random postal code.
country() : Generates a random country name.
sentence() : Generates a random sentence.
paragraph() : Generates a random paragraph.
text() : Generates a random text.
randomElement($array) : Returns a random element from the given array.
dateTime($max = 'now', $timezone = null) : Generates a random date and time.
numberBetween($min = 0, $max = 2147483647) : Generates a random number between the given range.
boolean() : Generates a random boolean value.

Lets' see how we can use these in our real life

So as we see in the above example first we'll initialize a $object of factory class and then we use a method called name() to generate a fake name. We can also get multiple names or countries as well. Let's look at the below example

Which can give you the list of countries like the above image. An even we can use it to generate multiple row for a table. For this, first we've to create a faker first using the following command.

For example we'll use the default UserFactory provided by Laravel. Just fire the below command in your terminal

Add if you see in your table, you can see you've created 10 user in users table.

That's it for today. Hope this tutorial will be helpful in your upcoming projects. Thanks for reading. 🙂

Tanvir Ahmed Hera

Random Stories

Laravel Eloquent Performance Patterns Part 4

How to Prevent Infinite Loops When Using useEffect() in ReactJS

Laravel Import and Export Excel/CSV

Laravel Socialite Login with Google Account With Breeze

How to Log SQL Queries in Laravel

Stack Overflow Public questions & answers
Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers
Talent Build your employer brand
Advertising Reach developers & technologists worldwide
Labs The future of collective knowledge sharing
About the company

Collectives™ on Stack Overflow

Find centralized, trusted content and collaborate around the technologies you use most.

Q&A for work

Connect and share knowledge within a single location that is structured and easy to search.

Laravel str_random() or custom function?

Is the Laravel str_random() function random enough so that I can use it for IDs?

For example:

This produces a random string of length 32 made up of alphanumeric characters [a-zA-z0-9] (62 characters in total).

Which equates to 2272657884496751345355241563627544170162852933518655225856 possibilities.

However, my question is, is this going to be good enough? Or should I consider using UUIDs or another custom function.

1 You could always check to make sure it's not a duplicate before saving it, like when generating unique slugs. Of course, that's very unlikely to happen. – BenjaminRH Apr 11, 2014 at 14:51

7 Answers 7

str_random ( Str::random() ) tries to use openssl_random_pseudo_bytes which is a pseudo random number generator optimized for cryptography, not uniqueness. If openssl_random_pseudo_bytes is not available, it falls back to quickRandom() :

In my opinion quickRandom code is not reliable for uniqueness nor cryptography.

Yes, having openssl_random_pseudo_bytes and using 32 bytes is almost impossible to see a collision, but it's still possible. If you want to make sure your strings/numbers will be unique (99.99%), you better use a UUID function. This is what I normally use:

It generates a VALID RFC 4211 COMPLIANT version 4 UUID.

Check this: https://en.wikipedia.org/wiki/Universally_unique_identifier#Collisions

Where you state 'if it is available' with respect to openssl, why wouldn't it be? Also, what is the best method for uniqueness as I will be using the strings as IDs. – Michael Apr 11, 2014 at 15:45
In this line: github.com/laravel/framework/blob/master/src/Illuminate/Support/… , Taylor check if it's available, so I have to presume it might not always be. – Antonio Carlos Ribeiro Apr 11, 2014 at 15:50
In your opinion, would quickRandom suffice? if I were to check that it is of course unique before I save it. Chances of two collisions occurring consecutively are very slim...? – Michael Apr 11, 2014 at 15:52
It's not. It may be good for temporary file creation/deletion, or to provide html unique id on pages, to give some examples, but not to be used as id. Edited to make it clearer. – Antonio Carlos Ribeiro Apr 11, 2014 at 16:01
6 For your UUID, all you're doing is generating a really long random number based entirely off mt_rand() . It'd be no different from doing mt_rand($largeNumber, $largerNumber) ... you're just adding some dashes to make it look less like a really long number. – Stephen RC Aug 1, 2016 at 6:17

you can use this

1 which was worked on laravel 8. you are welcome – Mohamed Raza Jul 20, 2021 at 16:48

The accepted answer was true in April of 2014. It is not accurate anymore. In November of 2014 there was a commit which removed the use of quickRandom . As random_bytes became available in PHP 7 Laravel slowly shifted to that function and uses that one only without any fallback.

ramsey/uuid is the default UUID library in Laravel. By looking at the code we can find out the default random generator is RandomBytesGenerator which uses random_bytes . The same method Str::random uses.

The Wikipedia page about UUID states the following about UUID v4:

[...] version-4 UUID will have 6 predetermined variant and version bits, leaving 122 bits for the randomly generated part, [...]

https://en.wikipedia.org/wiki/Universally_unique_identifier#Version_4_(random)

128 bits = 122 random bits + 6 version bits. 128 bits is exactly 16 bytes. Most of the UUID implementations reads 16 bytes of random bytes and then replaces the version at the specified position (in case of v4).

All in all, as of now it is almost the same if you would use Str::random with length equal to 16 or Uuid::uuid4 (without modifying the randomGenerator of Uuid ).

To make it more unique use TIMESTAMP and concat row id with it simple and zero possibility to repeat number

You can use this package.

I'm using Laravel 6 version, on that Illuminate\Support\Str::random works well however neither str_random nor Illuminate\Support\Str::str_random works for me using Laravel 6.

Bellow you can see the function's documentation

the easier one is:

It will generate a 10 digit true unique number.

It does not generate a number, but a string with number and letters, and using time is not very secure, function like random_bytes is safer – Lk77 Apr 28, 2022 at 14:40
@LK77 It'll generate alpha numeric unique code with zero duplication possibility. – Abdur Rahim May 1, 2022 at 19:04
yeah but i can generate in advance every possible value, so better using uuid then – Lk77 May 2, 2022 at 6:46

Your Answer

Required, but never shown

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct .

Not the answer you're looking for? Browse other questions tagged string function random laravel uuid or ask your own question .

The Overflow Blog
What it’s like being a professional workplace bestie (Ep. 603)
Journey to the cloud part I: Migrating Stack Overflow Teams to Azure
Featured on Meta
Our Design Vision for Stack Overflow and the Stack Exchange network
Temporary policy: Generative AI (e.g., ChatGPT) is banned
Call for volunteer reviewers for an updated search experience: OverflowAI Search
Discussions experiment launching on NLP Collective

Hot Network Questions

What does the sky look like from the moon?
Why is there copper wire from a tv splitter to a water pipe in my house?
Capacitor and LDO voltage regulator gets really hot on circuit board
Main character is charged an exorbitant computing bill after abusing his uploaded consciousness powers
Inverse trigonometric functions
A short fiction about a woman repeatedly killed by another version of herself
Is this possible to boot an OS from some kind of a file?
Is there a relationship between Broué's abelian defect group conjecture and Alperin's weight conjecture?
How in Bash to test a name/string is an executable
Does a Swords Bard's extra damage count as damage that the original attack inflicts for Vampiric Bite's HP gain and roll bonus?
Can randomness create patterns?
Can a conditional be both vacuously true and false?
Problems with numbered custom styles of theorems beamer
Why does the ECB hold a large foreign currency reserve?
Defining a terminating `ripple`, with arguments swapping places
Converting an Unicode's image into polygon data for an SVG
How to use answer of NDSolve in NIntegrate
What is the taxicab number for rational fourth powers?
Pure Math in Industry
“No returns” policy for private individuals selling items “buy it now” style on eBay
Did D-Wave show quantum advantage in 2023?
Loading LSB first or MSB first?
Has it been proved that true post-quantum cryptography protocols exist?
We already have pipes & pattern matching at home!

Your privacy

By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy .

Generate random number in Laravel

If you want to generate the random string like you said, replace:

Before, the code wasn't generating a random alpha character all the time. Thats because Laravel's str_random generates a random alpha-numeric string, and sometimes that function returned a numeric value ( see docs ).

This should give you random number between 2 & 50.

use the function rand.

Generate random number

Implementation

Using range function

range — Create an array containing a range of elements Create an array containing a range of elements.

Using array_rand function

Picks one or more random entries out of an array, and returns the key (or keys) of the random entries. It uses a pseudo random number generator that is not suitable for cryptographic purposes.

You can use the rand() function to generate a random number. You can also create some characters and prefix the rand() with it.

How to Generate Random Number in PHP

Post author: Editorial Staff
Post published: June 20, 2022
Post category: PHP

Table of Contents

Hello developers, in this short tutorial, we will learn how to generate random number in PHP.

In many case, we may require to generate random number in PHP . It may be testing purpose, or may be id or number generation, or may be simply load testing. In PHP we can easily generate random number easily by using function.

The basic structure of the function to generate random number is:

So lets check these out with example:

Parameters:

Let’s say, for a lottery you have to randomly pick 100 winners. Than you have to define users range and run below programs to randomly select 100 winners.

That’s all for today. If you have any questions, you can comment below. If you loved this article, show love by sharing the article who might need it.

Have a nice day. Keep learning! See you in the next one.

Editorial Staff

How to Calculate Age in PHP

Create a Simple Queue System in PHP

PHP String to Array Conversion with Examples – 4 Easy Ways

Privacy overview.

Laravel Generate Random Unique Number Example

10-Apr-2023

Hello Friends,

Now let's see example of how to generate random unique number in laravel?. we will learn you generate random unique number example in laravel. i am going to show you laravel generate random unique number example.

If you want to generate random 6 digit number then i will give you simple and easy example with solution and output. we will learn how to generate random unique number in laravel.

Here, i will give you two example where you can generate 4, 6, 8, 10 digit random number with laravel. you can also use this example with laravel 6, laravel 7 and laravel 8 version.

So let's see the below example step by step:

Example 1: 4 Digit Random Code

namespace App\Http\Controllers;

class TestController extends Controller

* Write code on Method

* @return response()

public function index()

$randomNumber = random_int(1000, 9999);

dd($randomNumber);

Example 2 : Random Unique Number

use App\Models\Game;

class GameController extends Controller

'name' => 'WCC2',

'referal_code' => $this->generateUniqueCode()

$game = Game::create($input);

* Write referal_code on Method

public function generateUniqueCode()

$referal_code = random_int(100000, 999999);

} while (Game::where("referal_code", "=", $referal_code)->first());

return $referal_code;

[name] => WWC2

[referal_code] => 753698

[updated_at] => 2021-05-20T13:57:29.000000Z

[created_at] => 2021-05-20T13:57:29.000000Z

[id] => 1

It will help you....

# Laravel 8

# Laravel 7

# Laravel 6

✌️ Like this article? Follow me on Twitter and Facebook . You can also subscribe to RSS Feed.

Latest Posts

How to Install JQuery in Laravel 10?
How to Install Bootstrap 5 in Laravel 10?
Laravel 10 Remove Public From Url Code Example
Laravel 10 Custom Forgot Password Code Example
Laravel 10 Infinite Scroll Pagination using Ajax Example

Stack Exchange Network

Stack Exchange network consists of 183 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Code Review Stack Exchange is a question and answer site for peer programmer code reviews. It only takes a minute to sign up.

Q&A for work

Connect and share knowledge within a single location that is structured and easy to search.

PHP program to generate random phone number

I created a PHP program to generate random phone numbers. A valid phone number:

must be exactly 11 digits in length, and
must start with any of the values mentioned in the $a array, and

How can I improve it? Specifically, how can I improve

its readability, and
its performance, assuming I want to generate millions of results.

Use accurate and meaningful names for functions and variable to improve readability.
Condense your numeric loop conditions into a for loop versus while loop.
Avoid declaring single-use variables.
Make functions versatile by passing output-altering arguments with the call.
Write default argument values when possible/reasonable so that, in some cases, no arguments need to be passed for the most common scenario.
Avoid counting a static array in a loop. If you need to count it, count it once before entering the loop and reference the count variable.
If you prefer mt_rand 's randomness, use it in place of my array_rand() call below, but obey #6 about counting.
Obey PSR Coding Standards. Spacing and tabbing don't improve performance, but they sure make your code easier to read.

Some suggested applications of my generalized advice:

Code: ( Demo )

Possible Output:

Your Answer

Required, but never shown

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct .

Not the answer you're looking for? Browse other questions tagged php random or ask your own question .

The Overflow Blog
What it’s like being a professional workplace bestie (Ep. 603)
Journey to the cloud part I: Migrating Stack Overflow Teams to Azure
Featured on Meta
Our Design Vision for Stack Overflow and the Stack Exchange network

Hot Network Questions

Woman discovers she's the last known fae and has to go to a magical academy
Does this mean "Jerry was being taken aback by a stranger”
Does a Swords Bard's extra damage count as damage that the original attack inflicts for Vampiric Bite's HP gain and roll bonus?
Why does a chord sound lower although the individual notes went up?
Is there a relationship between Broué's abelian defect group conjecture and Alperin's weight conjecture?
Looking for specific alga and a recently extinct (or rare) marine animal from the same region for novel
Glyph origin of 蝠
A short fiction about a woman repeatedly killed by another version of herself
Page Indexing > Page with Redirect to Google Search Console
Pure Math in Industry
The image you are requesting does not exist?
A puzzle of d's (What is the full name of the artist shop?)
Where is the setting of Millay's poem Renascence?
What is Lefty talking about when he says "What kind of a man has a malvole"?
Inverse trigonometric functions
How to deduce the distance formula from a point to a straight line?
Defining a terminating `ripple`, with arguments swapping places
Drawing a maths protractor
What happens when an assumption, i.e. [[assume]] contains UB?
Why is the convolution of two sine waves a sinc function?
Typical pitch interval of the exclamation "uh-oh!"
What is the difference between @onready and _ready()?
Why is there copper wire from a tv splitter to a water pipe in my house?
Pay raise linked to velocity?

Your privacy

By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy .

Introduction

Available methods, benchmarking.

Laravel includes a variety of global "helper" PHP functions. Many of these functions are used by the framework itself; however, you are free to use them in your own applications if you find them convenient.

Arrays & Objects

Arr::accessible Arr::add Arr::collapse Arr::crossJoin Arr::divide Arr::dot Arr::except Arr::exists Arr::first Arr::flatten Arr::forget Arr::get Arr::has Arr::hasAny Arr::isAssoc Arr::isList Arr::join Arr::keyBy Arr::last Arr::map Arr::mapWithKeys Arr::only Arr::pluck Arr::prepend Arr::prependKeysWith Arr::pull Arr::query Arr::random Arr::set Arr::shuffle Arr::sort Arr::sortDesc Arr::sortRecursive Arr::sortRecursiveDesc Arr::toCssClasses Arr::toCssStyles Arr::undot Arr::where Arr::whereNotNull Arr::wrap data_fill data_get data_set data_forget head last

app_path base_path config_path database_path lang_path mix public_path resource_path storage_path

__ class_basename e preg_replace_array Str::after Str::afterLast Str::ascii Str::before Str::beforeLast Str::between Str::betweenFirst Str::camel Str::contains Str::containsAll Str::endsWith Str::excerpt Str::finish Str::headline Str::inlineMarkdown Str::is Str::isAscii Str::isJson Str::isUlid Str::isUrl Str::isUuid Str::kebab Str::lcfirst Str::length Str::limit Str::lower Str::markdown Str::mask Str::orderedUuid Str::padBoth Str::padLeft Str::padRight Str::password Str::plural Str::pluralStudly Str::random Str::remove Str::repeat Str::replace Str::replaceArray Str::replaceFirst Str::replaceLast Str::replaceStart Str::replaceEnd Str::reverse Str::singular Str::slug Str::snake Str::squish Str::start Str::startsWith Str::studly Str::substr Str::substrCount Str::substrReplace Str::swap Str::title Str::toHtmlString Str::ucfirst Str::ucsplit Str::upper Str::ulid Str::uuid Str::wordCount Str::wordWrap Str::words Str::wrap str trans trans_choice

Fluent Strings

after afterLast append ascii basename before beforeLast between betweenFirst camel classBasename contains containsAll dirname endsWith excerpt exactly explode finish headline inlineMarkdown is isAscii isEmpty isNotEmpty isJson isUlid isUrl isUuid kebab lcfirst length limit lower ltrim markdown mask match matchAll isMatch newLine padBoth padLeft padRight pipe plural prepend remove repeat replace replaceArray replaceFirst replaceLast replaceMatches replaceStart replaceEnd rtrim scan singular slug snake split squish start startsWith studly substr substrReplace swap tap test title trim ucfirst ucsplit upper when whenContains whenContainsAll whenEmpty whenNotEmpty whenStartsWith whenEndsWith whenExactly whenNotExactly whenIs whenIsAscii whenIsUlid whenIsUuid whenTest wordCount words

action asset route secure_asset secure_url to_route url

Miscellaneous

abort abort_if abort_unless app auth back bcrypt blank broadcast cache class_uses_recursive collect config cookie csrf_field csrf_token decrypt dd dispatch dispatch_sync dump encrypt env event fake filled info logger method_field now old optional policy redirect report report_if report_unless request rescue resolve response retry session tap throw_if throw_unless today trait_uses_recursive transform validator value view with

Method Listing

Arr::accessible().

The Arr::accessible method determines if the given value is array accessible:

The Arr::add method adds a given key / value pair to an array if the given key doesn't already exist in the array or is set to null :

Arr::collapse()

The Arr::collapse method collapses an array of arrays into a single array:

Arr::crossJoin()

The Arr::crossJoin method cross joins the given arrays, returning a Cartesian product with all possible permutations:

Arr::divide()

The Arr::divide method returns two arrays: one containing the keys and the other containing the values of the given array:

The Arr::dot method flattens a multi-dimensional array into a single level array that uses "dot" notation to indicate depth:

Arr::except()

The Arr::except method removes the given key / value pairs from an array:

Arr::exists()

The Arr::exists method checks that the given key exists in the provided array:

Arr::first()

The Arr::first method returns the first element of an array passing a given truth test:

A default value may also be passed as the third parameter to the method. This value will be returned if no value passes the truth test:

Arr::flatten()

The Arr::flatten method flattens a multi-dimensional array into a single level array:

Arr::forget()

The Arr::forget method removes a given key / value pair from a deeply nested array using "dot" notation:

The Arr::get method retrieves a value from a deeply nested array using "dot" notation:

The Arr::get method also accepts a default value, which will be returned if the specified key is not present in the array:

The Arr::has method checks whether a given item or items exists in an array using "dot" notation:

Arr::hasAny()

The Arr::hasAny method checks whether any item in a given set exists in an array using "dot" notation:

Arr::isAssoc()

The Arr::isAssoc method returns true if the given array is an associative array. An array is considered "associative" if it doesn't have sequential numerical keys beginning with zero:

Arr::isList()

The Arr::isList method returns true if the given array's keys are sequential integers beginning from zero:

Arr::join()

The Arr::join method joins array elements with a string. Using this method's second argument, you may also specify the joining string for the final element of the array:

Arr::keyBy()

The Arr::keyBy method keys the array by the given key. If multiple items have the same key, only the last one will appear in the new array:

Arr::last()

The Arr::last method returns the last element of an array passing a given truth test:

A default value may be passed as the third argument to the method. This value will be returned if no value passes the truth test:

The Arr::map method iterates through the array and passes each value and key to the given callback. The array value is replaced by the value returned by the callback:

Arr::mapWithKeys()

The Arr::mapWithKeys method iterates through the array and passes each value to the given callback. The callback should return an associative array containing a single key / value pair:

Arr::only()

The Arr::only method returns only the specified key / value pairs from the given array:

Arr::pluck()

The Arr::pluck method retrieves all of the values for a given key from an array:

You may also specify how you wish the resulting list to be keyed:

Arr::prepend()

The Arr::prepend method will push an item onto the beginning of an array:

If needed, you may specify the key that should be used for the value:

Arr::prependKeysWith()

The Arr::prependKeysWith prepends all key names of an associative array with the given prefix:

Arr::pull()

The Arr::pull method returns and removes a key / value pair from an array:

A default value may be passed as the third argument to the method. This value will be returned if the key doesn't exist:

Arr::query()

The Arr::query method converts the array into a query string:

Arr::random()

The Arr::random method returns a random value from an array:

You may also specify the number of items to return as an optional second argument. Note that providing this argument will return an array even if only one item is desired:

The Arr::set method sets a value within a deeply nested array using "dot" notation:

Arr::shuffle()

The Arr::shuffle method randomly shuffles the items in the array:

Arr::sort()

The Arr::sort method sorts an array by its values:

You may also sort the array by the results of a given closure:

Arr::sortDesc()

The Arr::sortDesc method sorts an array in descending order by its values:

Arr::sortRecursive()

The Arr::sortRecursive method recursively sorts an array using the sort function for numerically indexed sub-arrays and the ksort function for associative sub-arrays:

If you would like the results sorted in descending order, you may use the Arr::sortRecursiveDesc method.

Arr::toCssClasses()

The Arr::toCssClasses conditionally compiles a CSS class string. The method accepts an array of classes where the array key contains the class or classes you wish to add, while the value is a boolean expression. If the array element has a numeric key, it will always be included in the rendered class list:

Arr::toCssStyles()

The Arr::toCssStyles conditionally compiles a CSS style string. The method accepts an array of classes where the array key contains the class or classes you wish to add, while the value is a boolean expression. If the array element has a numeric key, it will always be included in the rendered class list:

This method powers Laravel's functionality allowing merging classes with a Blade component's attribute bag as well as the @class Blade directive .

Arr::undot()

The Arr::undot method expands a single-dimensional array that uses "dot" notation into a multi-dimensional array:

Arr::where()

The Arr::where method filters an array using the given closure:

Arr::whereNotNull()

The Arr::whereNotNull method removes all null values from the given array:

Arr::wrap()

The Arr::wrap method wraps the given value in an array. If the given value is already an array it will be returned without modification:

If the given value is null , an empty array will be returned:

data_fill()

The data_fill function sets a missing value within a nested array or object using "dot" notation:

This function also accepts asterisks as wildcards and will fill the target accordingly:

The data_get function retrieves a value from a nested array or object using "dot" notation:

The data_get function also accepts a default value, which will be returned if the specified key is not found:

The function also accepts wildcards using asterisks, which may target any key of the array or object:

The data_set function sets a value within a nested array or object using "dot" notation:

This function also accepts wildcards using asterisks and will set values on the target accordingly:

By default, any existing values are overwritten. If you wish to only set a value if it doesn't exist, you may pass false as the fourth argument to the function:

data_forget()

The data_forget function removes a value within a nested array or object using "dot" notation:

This function also accepts wildcards using asterisks and will remove values on the target accordingly:

The head function returns the first element in the given array:

The last function returns the last element in the given array:

The app_path function returns the fully qualified path to your application's app directory. You may also use the app_path function to generate a fully qualified path to a file relative to the application directory:

base_path()

The base_path function returns the fully qualified path to your application's root directory. You may also use the base_path function to generate a fully qualified path to a given file relative to the project root directory:

config_path()

The config_path function returns the fully qualified path to your application's config directory. You may also use the config_path function to generate a fully qualified path to a given file within the application's configuration directory:

database_path()

The database_path function returns the fully qualified path to your application's database directory. You may also use the database_path function to generate a fully qualified path to a given file within the database directory:

lang_path()

The lang_path function returns the fully qualified path to your application's lang directory. You may also use the lang_path function to generate a fully qualified path to a given file within the directory:

Note By default, the Laravel application skeleton does not include the lang directory. If you would like to customize Laravel's language files, you may publish them via the lang:publish Artisan command.

The mix function returns the path to a versioned Mix file :

public_path()

The public_path function returns the fully qualified path to your application's public directory. You may also use the public_path function to generate a fully qualified path to a given file within the public directory:

resource_path()

The resource_path function returns the fully qualified path to your application's resources directory. You may also use the resource_path function to generate a fully qualified path to a given file within the resources directory:

storage_path()

The storage_path function returns the fully qualified path to your application's storage directory. You may also use the storage_path function to generate a fully qualified path to a given file within the storage directory:

The __ function translates the given translation string or translation key using your language files :

If the specified translation string or key does not exist, the __ function will return the given value. So, using the example above, the __ function would return messages.welcome if that translation key does not exist.

class_basename()

The class_basename function returns the class name of the given class with the class's namespace removed:

The e function runs PHP's htmlspecialchars function with the double_encode option set to true by default:

preg_replace_array()

The preg_replace_array function replaces a given pattern in the string sequentially using an array:

Str::after()

The Str::after method returns everything after the given value in a string. The entire string will be returned if the value does not exist within the string:

Str::afterLast()

The Str::afterLast method returns everything after the last occurrence of the given value in a string. The entire string will be returned if the value does not exist within the string:

Str::ascii()

The Str::ascii method will attempt to transliterate the string into an ASCII value:

Str::before()

The Str::before method returns everything before the given value in a string:

Str::beforeLast()

The Str::beforeLast method returns everything before the last occurrence of the given value in a string:

Str::between()

The Str::between method returns the portion of a string between two values:

Str::betweenFirst()

The Str::betweenFirst method returns the smallest possible portion of a string between two values:

Str::camel()

The Str::camel method converts the given string to camelCase :

Str::contains()

The Str::contains method determines if the given string contains the given value. This method is case sensitive:

You may also pass an array of values to determine if the given string contains any of the values in the array:

Str::containsAll()

The Str::containsAll method determines if the given string contains all of the values in a given array:

Str::endsWith()

The Str::endsWith method determines if the given string ends with the given value:

You may also pass an array of values to determine if the given string ends with any of the values in the array:

Str::excerpt()

The Str::excerpt method extracts an excerpt from a given string that matches the first instance of a phrase within that string:

The radius option, which defaults to 100 , allows you to define the number of characters that should appear on each side of the truncated string.

In addition, you may use the omission option to define the string that will be prepended and appended to the truncated string:

Str::finish()

The Str::finish method adds a single instance of the given value to a string if it does not already end with that value:

Str::headline()

The Str::headline method will convert strings delimited by casing, hyphens, or underscores into a space delimited string with each word's first letter capitalized:

Str::inlineMarkdown()

The Str::inlineMarkdown method converts GitHub flavored Markdown into inline HTML using CommonMark . However, unlike the markdown method, it does not wrap all generated HTML in a block-level element:

The Str::is method determines if a given string matches a given pattern. Asterisks may be used as wildcard values:

Str::isAscii()

The Str::isAscii method determines if a given string is 7 bit ASCII:

Str::isJson()

The Str::isJson method determines if the given string is valid JSON:

Str::isUrl()

The Str::isUrl method determines if the given string is a valid URL:

Str::isUlid()

The Str::isUlid method determines if the given string is a valid ULID:

Str::isUuid()

The Str::isUuid method determines if the given string is a valid UUID:

Str::kebab()

The Str::kebab method converts the given string to kebab-case :

Str::lcfirst()

The Str::lcfirst method returns the given string with the first character lowercased:

Str::length()

The Str::length method returns the length of the given string:

Str::limit()

The Str::limit method truncates the given string to the specified length:

You may pass a third argument to the method to change the string that will be appended to the end of the truncated string:

Str::lower()

The Str::lower method converts the given string to lowercase:

Str::markdown()

The Str::markdown method converts GitHub flavored Markdown into HTML using CommonMark :

Str::mask()

The Str::mask method masks a portion of a string with a repeated character, and may be used to obfuscate segments of strings such as email addresses and phone numbers:

If needed, you provide a negative number as the third argument to the mask method, which will instruct the method to begin masking at the given distance from the end of the string:

Str::orderedUuid()

The Str::orderedUuid method generates a "timestamp first" UUID that may be efficiently stored in an indexed database column. Each UUID that is generated using this method will be sorted after UUIDs previously generated using the method:

Str::padBoth()

The Str::padBoth method wraps PHP's str_pad function, padding both sides of a string with another string until the final string reaches a desired length:

Str::padLeft()

The Str::padLeft method wraps PHP's str_pad function, padding the left side of a string with another string until the final string reaches a desired length:

Str::padRight()

The Str::padRight method wraps PHP's str_pad function, padding the right side of a string with another string until the final string reaches a desired length:

Str::password()

The Str::password method may be used to generate a secure, random password of a given length. The password will consist of a combination of letters, numbers, symbols, and spaces. By default, passwords are 32 characters long:

Str::plural()

The Str::plural method converts a singular word string to its plural form. This function supports any of the languages support by Laravel's pluralizer :

You may provide an integer as a second argument to the function to retrieve the singular or plural form of the string:

Str::pluralStudly()

The Str::pluralStudly method converts a singular word string formatted in studly caps case to its plural form. This function supports any of the languages support by Laravel's pluralizer :

Str::random()

The Str::random method generates a random string of the specified length. This function uses PHP's random_bytes function:

Str::remove()

The Str::remove method removes the given value or array of values from the string:

You may also pass false as a third argument to the remove method to ignore case when removing strings.

Str::repeat()

The Str::repeat method repeats the given string:

Str::replace()

The Str::replace method replaces a given string within the string:

The replace method also accepts a caseSensitive argument. By default, the replace method is case sensitive:

Str::replaceArray()

The Str::replaceArray method replaces a given value in the string sequentially using an array:

Str::replaceFirst()

The Str::replaceFirst method replaces the first occurrence of a given value in a string:

Str::replaceLast()

The Str::replaceLast method replaces the last occurrence of a given value in a string:

Str::replaceStart()

The Str::replaceStart method replaces the first occurrence of the given value only if the value appears at the start of the string:

Str::replaceEnd()

The Str::replaceEnd method replaces the last occurrence of the given value only if the value appears at the end of the string:

Str::reverse()

The Str::reverse method reverses the given string:

Str::singular()

The Str::singular method converts a string to its singular form. This function supports any of the languages support by Laravel's pluralizer :

Str::slug()

The Str::slug method generates a URL friendly "slug" from the given string:

Str::snake()

The Str::snake method converts the given string to snake_case :

Str::squish()

The Str::squish method removes all extraneous white space from a string, including extraneous white space between words:

Str::start()

The Str::start method adds a single instance of the given value to a string if it does not already start with that value:

Str::startsWith()

The Str::startsWith method determines if the given string begins with the given value:

If an array of possible values is passed, the startsWith method will return true if the string begins with any of the given values:

Str::studly()

The Str::studly method converts the given string to StudlyCase :

Str::substr()

The Str::substr method returns the portion of string specified by the start and length parameters:

Str::substrCount()

The Str::substrCount method returns the number of occurrences of a given value in the given string:

Str::substrReplace()

The Str::substrReplace method replaces text within a portion of a string, starting at the position specified by the third argument and replacing the number of characters specified by the fourth argument. Passing 0 to the method's fourth argument will insert the string at the specified position without replacing any of the existing characters in the string:

Str::swap()

The Str::swap method replaces multiple values in the given string using PHP's strtr function:

Str::title()

The Str::title method converts the given string to Title Case :

Str::toHtmlString()

The Str::toHtmlString method converts the string instance to an instance of Illuminate\Support\HtmlString , which may be displayed in Blade templates:

Str::ucfirst()

The Str::ucfirst method returns the given string with the first character capitalized:

Str::ucsplit()

The Str::ucsplit method splits the given string into an array by uppercase characters:

Str::upper()

The Str::upper method converts the given string to uppercase:

Str::ulid()

The Str::ulid method generates a ULID, which is a compact, time-ordered unique identifier:

If you would like to retrieve a Illuminate\Support\Carbon date instance representing the date and time that a given ULID was created, you may use the createFromId method provided by Laravel's Carbon integration:

Str::uuid()

The Str::uuid method generates a UUID (version 4):

Str::wordCount()

The Str::wordCount method returns the number of words that a string contains:

Str::wordWrap()

The Str::wordWrap method wraps a string to a given number of characters:

Str::words()

The Str::words method limits the number of words in a string. An additional string may be passed to this method via its third argument to specify which string should be appended to the end of the truncated string:

Str::wrap()

The Str::wrap method wraps the given string with an additional string or pair of strings:

The str function returns a new Illuminate\Support\Stringable instance of the given string. This function is equivalent to the Str::of method:

If no argument is provided to the str function, the function returns an instance of Illuminate\Support\Str :

The trans function translates the given translation key using your language files :

If the specified translation key does not exist, the trans function will return the given key. So, using the example above, the trans function would return messages.welcome if the translation key does not exist.

trans_choice()

The trans_choice function translates the given translation key with inflection:

If the specified translation key does not exist, the trans_choice function will return the given key. So, using the example above, the trans_choice function would return messages.notifications if the translation key does not exist.

Fluent strings provide a more fluent, object-oriented interface for working with string values, allowing you to chain multiple string operations together using a more readable syntax compared to traditional string operations.

The after method returns everything after the given value in a string. The entire string will be returned if the value does not exist within the string:

The afterLast method returns everything after the last occurrence of the given value in a string. The entire string will be returned if the value does not exist within the string:

The append method appends the given values to the string:

The ascii method will attempt to transliterate the string into an ASCII value:

The basename method will return the trailing name component of the given string:

If needed, you may provide an "extension" that will be removed from the trailing component:

The before method returns everything before the given value in a string:

The beforeLast method returns everything before the last occurrence of the given value in a string:

The between method returns the portion of a string between two values:

betweenFirst

The betweenFirst method returns the smallest possible portion of a string between two values:

The camel method converts the given string to camelCase :

classBasename

The classBasename method returns the class name of the given class with the class's namespace removed:

The contains method determines if the given string contains the given value. This method is case sensitive:

containsAll

The containsAll method determines if the given string contains all of the values in the given array:

The dirname method returns the parent directory portion of the given string:

If necessary, you may specify how many directory levels you wish to trim from the string:

The excerpt method extracts an excerpt from the string that matches the first instance of a phrase within that string:

In addition, you may use the omission option to change the string that will be prepended and appended to the truncated string:

The endsWith method determines if the given string ends with the given value:

The exactly method determines if the given string is an exact match with another string:

The explode method splits the string by the given delimiter and returns a collection containing each section of the split string:

The finish method adds a single instance of the given value to a string if it does not already end with that value:

The headline method will convert strings delimited by casing, hyphens, or underscores into a space delimited string with each word's first letter capitalized:

inlineMarkdown

The inlineMarkdown method converts GitHub flavored Markdown into inline HTML using CommonMark . However, unlike the markdown method, it does not wrap all generated HTML in a block-level element:

The is method determines if a given string matches a given pattern. Asterisks may be used as wildcard values

The isAscii method determines if a given string is an ASCII string:

The isEmpty method determines if the given string is empty:

The isNotEmpty method determines if the given string is not empty:

The isJson method determines if a given string is valid JSON:

The isUlid method determines if a given string is a ULID:

The isUrl method determines if a given string is a URL:

The isUuid method determines if a given string is a UUID:

The kebab method converts the given string to kebab-case :

The lcfirst method returns the given string with the first character lowercased:

The length method returns the length of the given string:

The limit method truncates the given string to the specified length:

You may also pass a second argument to change the string that will be appended to the end of the truncated string:

The lower method converts the given string to lowercase:

The ltrim method trims the left side of the string:

The markdown method converts GitHub flavored Markdown into HTML:

The mask method masks a portion of a string with a repeated character, and may be used to obfuscate segments of strings such as email addresses and phone numbers:

If needed, you may provide negative numbers as the third or fourth argument to the mask method, which will instruct the method to begin masking at the given distance from the end of the string:

The match method will return the portion of a string that matches a given regular expression pattern:

The matchAll method will return a collection containing the portions of a string that match a given regular expression pattern:

If you specify a matching group within the expression, Laravel will return a collection of that group's matches:

If no matches are found, an empty collection will be returned.

The isMatch method will return true if the string matches a given regular expression:

The newLine method appends an "end of line" character to a string:

The padBoth method wraps PHP's str_pad function, padding both sides of a string with another string until the final string reaches the desired length:

The padLeft method wraps PHP's str_pad function, padding the left side of a string with another string until the final string reaches the desired length:

The padRight method wraps PHP's str_pad function, padding the right side of a string with another string until the final string reaches the desired length:

The pipe method allows you to transform the string by passing its current value to the given callable:

The plural method converts a singular word string to its plural form. This function supports any of the languages support by Laravel's pluralizer :

The prepend method prepends the given values onto the string:

The remove method removes the given value or array of values from the string:

You may also pass false as a second parameter to ignore case when removing strings.

The repeat method repeats the given string:

The replace method replaces a given string within the string:

replaceArray

The replaceArray method replaces a given value in the string sequentially using an array:

replaceFirst

The replaceFirst method replaces the first occurrence of a given value in a string:

replaceLast

The replaceLast method replaces the last occurrence of a given value in a string:

replaceMatches

The replaceMatches method replaces all portions of a string matching a pattern with the given replacement string:

The replaceMatches method also accepts a closure that will be invoked with each portion of the string matching the given pattern, allowing you to perform the replacement logic within the closure and return the replaced value:

replaceStart

The replaceStart method replaces the first occurrence of the given value only if the value appears at the start of the string:

The replaceEnd method replaces the last occurrence of the given value only if the value appears at the end of the string:

The rtrim method trims the right side of the given string:

The scan method parses input from a string into a collection according to a format supported by the sscanf PHP function :

The singular method converts a string to its singular form. This function supports any of the languages support by Laravel's pluralizer :

The slug method generates a URL friendly "slug" from the given string:

The snake method converts the given string to snake_case :

The split method splits a string into a collection using a regular expression:

The squish method removes all extraneous white space from a string, including extraneous white space between words:

The start method adds a single instance of the given value to a string if it does not already start with that value:

The startsWith method determines if the given string begins with the given value:

The studly method converts the given string to StudlyCase :

The substr method returns the portion of the string specified by the given start and length parameters:

substrReplace

The substrReplace method replaces text within a portion of a string, starting at the position specified by the second argument and replacing the number of characters specified by the third argument. Passing 0 to the method's third argument will insert the string at the specified position without replacing any of the existing characters in the string:

The swap method replaces multiple values in the string using PHP's strtr function:

The tap method passes the string to the given closure, allowing you to examine and interact with the string while not affecting the string itself. The original string is returned by the tap method regardless of what is returned by the closure:

The test method determines if a string matches the given regular expression pattern:

The title method converts the given string to Title Case :

The trim method trims the given string:

The ucfirst method returns the given string with the first character capitalized:

The ucsplit method splits the given string into a collection by uppercase characters:

The upper method converts the given string to uppercase:

The when method invokes the given closure if a given condition is true . The closure will receive the fluent string instance:

If necessary, you may pass another closure as the third parameter to the when method. This closure will execute if the condition parameter evaluates to false .

whenContains

The whenContains method invokes the given closure if the string contains the given value. The closure will receive the fluent string instance:

If necessary, you may pass another closure as the third parameter to the when method. This closure will execute if the string does not contain the given value.

whenContainsAll

The whenContainsAll method invokes the given closure if the string contains all of the given sub-strings. The closure will receive the fluent string instance:

The whenEmpty method invokes the given closure if the string is empty. If the closure returns a value, that value will also be returned by the whenEmpty method. If the closure does not return a value, the fluent string instance will be returned:

whenNotEmpty

The whenNotEmpty method invokes the given closure if the string is not empty. If the closure returns a value, that value will also be returned by the whenNotEmpty method. If the closure does not return a value, the fluent string instance will be returned:

whenStartsWith

The whenStartsWith method invokes the given closure if the string starts with the given sub-string. The closure will receive the fluent string instance:

whenEndsWith

The whenEndsWith method invokes the given closure if the string ends with the given sub-string. The closure will receive the fluent string instance:

whenExactly

The whenExactly method invokes the given closure if the string exactly matches the given string. The closure will receive the fluent string instance:

whenNotExactly

The whenNotExactly method invokes the given closure if the string does not exactly match the given string. The closure will receive the fluent string instance:

The whenIs method invokes the given closure if the string matches a given pattern. Asterisks may be used as wildcard values. The closure will receive the fluent string instance:

whenIsAscii

The whenIsAscii method invokes the given closure if the string is 7 bit ASCII. The closure will receive the fluent string instance:

The whenIsUlid method invokes the given closure if the string is a valid ULID. The closure will receive the fluent string instance:

The whenIsUuid method invokes the given closure if the string is a valid UUID. The closure will receive the fluent string instance:

The whenTest method invokes the given closure if the string matches the given regular expression. The closure will receive the fluent string instance:

The wordCount method returns the number of words that a string contains:

The words method limits the number of words in a string. If necessary, you may specify an additional string that will be appended to the truncated string:

The action function generates a URL for the given controller action:

If the method accepts route parameters, you may pass them as the second argument to the method:

The asset function generates a URL for an asset using the current scheme of the request (HTTP or HTTPS):

You can configure the asset URL host by setting the ASSET_URL variable in your .env file. This can be useful if you host your assets on an external service like Amazon S3 or another CDN:

The route function generates a URL for a given named route :

If the route accepts parameters, you may pass them as the second argument to the function:

By default, the route function generates an absolute URL. If you wish to generate a relative URL, you may pass false as the third argument to the function:

secure_asset()

The secure_asset function generates a URL for an asset using HTTPS:

secure_url()

The secure_url function generates a fully qualified HTTPS URL to the given path. Additional URL segments may be passed in the function's second argument:

The to_route function generates a redirect HTTP response for a given named route :

If necessary, you may pass the HTTP status code that should be assigned to the redirect and any additional response headers as the third and fourth arguments to the to_route method:

The url function generates a fully qualified URL to the given path:

If no path is provided, an Illuminate\Routing\UrlGenerator instance is returned:

The abort function throws an HTTP exception which will be rendered by the exception handler :

You may also provide the exception's message and custom HTTP response headers that should be sent to the browser:

The abort_if function throws an HTTP exception if a given boolean expression evaluates to true :

Like the abort method, you may also provide the exception's response text as the third argument and an array of custom response headers as the fourth argument to the function.

abort_unless()

The abort_unless function throws an HTTP exception if a given boolean expression evaluates to false :

The app function returns the service container instance:

You may pass a class or interface name to resolve it from the container:

The auth function returns an authenticator instance. You may use it as an alternative to the Auth facade:

If needed, you may specify which guard instance you would like to access:

The back function generates a redirect HTTP response to the user's previous location:

The bcrypt function hashes the given value using Bcrypt. You may use this function as an alternative to the Hash facade:

The blank function determines whether the given value is "blank":

For the inverse of blank , see the filled method.

broadcast()

The broadcast function broadcasts the given event to its listeners:

The cache function may be used to get values from the cache . If the given key does not exist in the cache, an optional default value will be returned:

You may add items to the cache by passing an array of key / value pairs to the function. You should also pass the number of seconds or duration the cached value should be considered valid:

class_uses_recursive()

The class_uses_recursive function returns all traits used by a class, including traits used by all of its parent classes:

The collect function creates a collection instance from the given value:

The config function gets the value of a configuration variable. The configuration values may be accessed using "dot" syntax, which includes the name of the file and the option you wish to access. A default value may be specified and is returned if the configuration option does not exist:

You may set configuration variables at runtime by passing an array of key / value pairs. However, note that this function only affects the configuration value for the current request and does not update your actual configuration values:

The cookie function creates a new cookie instance:

csrf_field()

The csrf_field function generates an HTML hidden input field containing the value of the CSRF token. For example, using Blade syntax :

csrf_token()

The csrf_token function retrieves the value of the current CSRF token:

The decrypt function decrypts the given value. You may use this function as an alternative to the Crypt facade:

The dd function dumps the given variables and ends execution of the script:

If you do not want to halt the execution of your script, use the dump function instead.

The dispatch function pushes the given job onto the Laravel job queue :

dispatch_sync()

The dispatch_sync function pushes the given job to the sync queue so that it is processed immediately:

The dump function dumps the given variables:

If you want to stop executing the script after dumping the variables, use the dd function instead.

The encrypt function encrypts the given value. You may use this function as an alternative to the Crypt facade:

The env function retrieves the value of an environment variable or returns a default value:

Warning If you execute the config:cache command during your deployment process, you should be sure that you are only calling the env function from within your configuration files. Once the configuration has been cached, the .env file will not be loaded and all calls to the env function will return null .

The event function dispatches the given event to its listeners:

The fake function resolves a Faker singleton from the container, which can be useful when creating fake data in model factories, database seeding, tests, and prototyping views:

By default, the fake function will utilize the app.faker_locale configuration option in your config/app.php configuration file; however, you may also specify the locale by passing it to the fake function. Each locale will resolve an individual singleton:

The filled function determines whether the given value is not "blank":

For the inverse of filled , see the blank method.

The info function will write information to your application's log :

An array of contextual data may also be passed to the function:

The logger function can be used to write a debug level message to the log :

A logger instance will be returned if no value is passed to the function:

method_field()

The method_field function generates an HTML hidden input field containing the spoofed value of the form's HTTP verb. For example, using Blade syntax :

The now function creates a new Illuminate\Support\Carbon instance for the current time:

The old function retrieves an old input value flashed into the session:

Since the "default value" provided as the second argument to the old function is often an attribute of an Eloquent model, Laravel allows you to simply pass the entire Eloquent model as the second argument to the old function. When doing so, Laravel will assume the first argument provided to the old function is the name of the Eloquent attribute that should be considered the "default value":

The optional function accepts any argument and allows you to access properties or call methods on that object. If the given object is null , properties and methods will return null instead of causing an error:

The optional function also accepts a closure as its second argument. The closure will be invoked if the value provided as the first argument is not null:

The policy method retrieves a policy instance for a given class:

The redirect function returns a redirect HTTP response , or returns the redirector instance if called with no arguments:

The report function will report an exception using your exception handler :

The report function also accepts a string as an argument. When a string is given to the function, the function will create an exception with the given string as its message:

report_if()

The report_if function will report an exception using your exception handler if the given condition is true :

report_unless()

The report_unless function will report an exception using your exception handler if the given condition is false :

The request function returns the current request instance or obtains an input field's value from the current request:

The rescue function executes the given closure and catches any exceptions that occur during its execution. All exceptions that are caught will be sent to your exception handler ; however, the request will continue processing:

You may also pass a second argument to the rescue function. This argument will be the "default" value that should be returned if an exception occurs while executing the closure:

A report argument may be provided to the rescue function to determine if the exception should be reported via the report function:

The resolve function resolves a given class or interface name to an instance using the service container :

The response function creates a response instance or obtains an instance of the response factory:

The retry function attempts to execute the given callback until the given maximum attempt threshold is met. If the callback does not throw an exception, its return value will be returned. If the callback throws an exception, it will automatically be retried. If the maximum attempt count is exceeded, the exception will be thrown:

If you would like to manually calculate the number of milliseconds to sleep between attempts, you may pass a closure as the third argument to the retry function:

For convenience, you may provide an array as the first argument to the retry function. This array will be used to determine how many milliseconds to sleep between subsequent attempts:

To only retry under specific conditions, you may pass a closure as the fourth argument to the retry function:

The session function may be used to get or set session values:

You may set values by passing an array of key / value pairs to the function:

The session store will be returned if no value is passed to the function:

The tap function accepts two arguments: an arbitrary $value and a closure. The $value will be passed to the closure and then be returned by the tap function. The return value of the closure is irrelevant:

If no closure is passed to the tap function, you may call any method on the given $value . The return value of the method you call will always be $value , regardless of what the method actually returns in its definition. For example, the Eloquent update method typically returns an integer. However, we can force the method to return the model itself by chaining the update method call through the tap function:

To add a tap method to a class, you may add the Illuminate\Support\Traits\Tappable trait to the class. The tap method of this trait accepts a Closure as its only argument. The object instance itself will be passed to the Closure and then be returned by the tap method:

The throw_if function throws the given exception if a given boolean expression evaluates to true :

throw_unless()

The throw_unless function throws the given exception if a given boolean expression evaluates to false :

The today function creates a new Illuminate\Support\Carbon instance for the current date:

trait_uses_recursive()

The trait_uses_recursive function returns all traits used by a trait:

transform()

The transform function executes a closure on a given value if the value is not blank and then returns the return value of the closure:

A default value or closure may be passed as the third argument to the function. This value will be returned if the given value is blank:

validator()

The validator function creates a new validator instance with the given arguments. You may use it as an alternative to the Validator facade:

The value function returns the value it is given. However, if you pass a closure to the function, the closure will be executed and its returned value will be returned:

Additional arguments may be passed to the value function. If the first argument is a closure then the additional parameters will be passed to the closure as arguments, otherwise they will be ignored:

The view function retrieves a view instance:

The with function returns the value it is given. If a closure is passed as the second argument to the function, the closure will be executed and its returned value will be returned:

Other Utilities

Sometimes you may wish to quickly test the performance of certain parts of your application. On those occasions, you may utilize the Benchmark support class to measure the number of milliseconds it takes for the given callbacks to complete:

By default, the given callbacks will be executed once (one iteration), and their duration will be displayed in the browser / console.

To invoke a callback more than once, you may specify the number of iterations that the callback should be invoked as the second argument to the method. When executing a callback more than once, the Benchmark class will return the average amount of milliseconds it took to execute the callback across all iterations:

Sometimes, you may want to benchmark the execution of a callback while still obtaining the value returned by the callback. The value method will return a tuple containing the value returned by the callback and the amount of milliseconds it took to execute the callback:

Laravel includes Carbon , a powerful date and time manipulation library. To create a new Carbon instance, you may invoke the now function. This function is globally available within your Laravel application:

Or, you may create a new Carbon instance using the Illuminate\Support\Carbon class:

For a thorough discussion of Carbon and its features, please consult the official Carbon documentation .

Laravel's lottery class may be used to execute callbacks based on a set of given odds. This can be particularly useful when you only want to execute code for a percentage of your incoming requests:

You may combine Laravel's lottery class with other Laravel features. For example, you may wish to only report a small percentage of slow queries to your exception handler. And, since the lottery class is callable, we may pass an instance of the class into any method that accepts callables:

Testing Lotteries

Laravel provides some simple methods to allow you to easily test your application's lottery invocations:

Laravel's Pipeline facade provides a convenient way to "pipe" a given input through a series of invokable classes, closures, or callables, giving each class the opportunity to inspect or modify the input and invoke the next callable in the pipeline:

As you can see, each invokable class or closure in the pipeline is provided the input and a $next closure. Invoking the $next closure will invoke the next callable in the pipeline. As you may have noticed, this is very similar to middleware .

When the last callable in the pipeline invokes the $next closure, the callable provided to the then method will be invoked. Typically, this callable will simply return the given input.

Of course, as discussed previously, you are not limited to providing closures to your pipeline. You may also provide invokable classes. If a class name is provided, the class will be instantiated via Laravel's service container , allowing dependencies to be injected into the invokable class:

Laravel's Sleep class is a light-weight wrapper around PHP's native sleep and usleep functions, offering greater testability while also exposing a developer friendly API for working with time:

The Sleep class offers a variety of methods that allow you to work with different units of time:

To easily combine units of time, you may use the and method:

Testing Sleep

When testing code that utilizes the Sleep class or PHP's native sleep functions, your test will pause execution. As you might expect, this makes your test suite significantly slower. For example, imagine you are testing the following code:

Typically, testing this code would take at least one second. Luckily, the Sleep class allows us to "fake" sleeping so that our test suite stays fast:

When faking the Sleep class, the actual execution pause is by-passed, leading to a substantially faster test.

Once the Sleep class has been faked, it is possible to make assertions against the expected "sleeps" that should have occurred. To illustrate this, let's imagine we are testing code that pauses execution three times, with each pause increasing by a single second. Using the assertSequence method, we can assert that our code "slept" for the proper amount of time while keeping our test fast:

Of course, the Sleep class offers a variety of other assertions you may use when testing:

Sometimes it may be useful to perform an action whenever a fake sleep occurs in your application code. To achieve this, you may provide a callback to the whenFakingSleep method. In the following example, we use Laravel's time manipulation helpers to instantly progress time by the duration of each sleep:

Laravel uses the Sleep class internally whenever it is pausing execution. For example, the retry helper uses the Sleep class when sleeping, allowing for improved testability when using that helper.

IMAGES

[Solved] Generate random number in Laravel
Laravel Generate Random Unique Number Example
mysql
laravel
Python Random Number Generation
Random Number Generator

VIDEO

BIOB20 video 1
Letting Random Number Generator App Decide What I Eat 🥲🥹
randomazing Lewandowski ovr whit a random number generator
A Random Number Generator Decides How Much I Stream
Laravel Precognition
HW Unleashed in 2023 Online Races #26 (The Number Generator Challenge)

COMMENTS

php
Generate random number in Laravel Ask Question Asked 9 years, 1 month ago Modified 6 months ago Viewed 135k times Part of PHP Collective 20 Please am working on a Project on Laravel and I wanted to Generate a Random Number in this format: one character in any position order and the rest integers.
How to generate unique random value for each user in laravel and add it
One solution is to grab all the random numbers in an array and generate a random number using Php rand (1000000000, 9999999999) and loop through and check all the values. Grab the first value that doesn't equal to any of the values in the array and add it to the database. But I am thinking that there might be a better solution to this.
Numbers and Strings
Documentation for FakerPHP / Faker. Numbers and Strings# randomDigit#. Generates a random integer from 0 until 9.
How to Generate Random Unique Number in Laravel?
In this post, i will give you two example where you can generate 4, 6, 8, 10 digit random number with laravel and you can learn how to generate random unique number in laravel. you can also use this example with laravel 6, laravel 7, laravel 8, laravel 9 and laravel 10 version. let's see both example: Example 1: 6 Digit Random Code <?php
php random x digit number
215 You can use rand () together with pow () to make this happen: $digits = 3; echo rand (pow (10, $digits-1), pow (10, $digits)-1); This will output a number between 100 and 999. This because 10^2 = 100 and 10^3 = 1000 and then you need to subtract it with one to get it in the desired range.
Laravel Generate 4,6,8,10 Digit Unique Random Number Example
Generate 4 digit unique random number in laravel You can use the following example to generate 4 digit unique random number in laravel: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Generate Unique Random Numbers in Laravel
Here is the code that can generate random and unique numbers. function ticket_number() { do { $number = random_int(1000000, 9999999); } while (Ticket::where("number", "=", $number)->first()); return $number; } As you can see it will not stop until the number generated is not unique using do while statement.
Laravel 5.2 generate random number and save to database
I am new to Laravel and I am creating a client table where i have different fields, but also, i have a field called client_number which i want to generate random numbers in laravel and save them to that specific column without a duplicate as well. Can anyone please help me. Thanks alot php laravel random numbers Share Improve this question Follow
How to generate random numbers from a pool of numbers in Laravel
Syntax ＄random = Arr::random(＄arr,5); Parameters The random () method takes two parameters: An array that contains numbers. The number of random numbers you want. Example ＄arr = [9,10,11,12,13,14]; ＄random = Arr::random(＄arr, 2);//randomly selecting 2 numbers from the numbers in the array return ＄random; Example explained
CreativeCrafts/laravel-secure-random-number-generator
laravel-secure-random-number-generator A handy package to generate a secure unique random number for a model. Installation You can install the package via composer: composer require creativecrafts/laravel-secure-random-number-generator You can publish the config file with: php artisan vendor:publish --tag= "secure-random-number-generator-config"
PHP: rand
Note: On some platforms (such as Windows), getrandmax() is only 32767. If you require a range larger than 32767, specifying min and max will allow you to create a range larger than this, or consider using mt_rand() instead. Note: As of PHP 7.1.0, rand() uses the same random number generator as mt_rand().To preserve backwards compatibility rand() allows max to be smaller than min as opposed to ...
Generate Unique Random Number And String In Laravel
If we need to generate unique random string then you can use str_random () helper of Laravel. It is very simple and we can use easily. See the below example to create a random string in Laravel:
PHP rand() Function
Generate random numbers: <?php echo(rand () . "<br>"); echo(rand () . "<br>"); echo(rand (10,100)); ?> Try it Yourself » Definition and Usage The rand () function generates a random integer. Example tip: If you want a random integer between 10 and 100 (inclusive), use rand (10,100).
Laravel 10
lastName(): Generates a random last name. email(): Generates a random email address. password(): Generates a random password. phoneNumber(): Generates a random phone number. address(): Generates a random address. city(): Generates a random city name. state(): Generates a random state name. postcode(): Generates a random postal code.
Laravel str_random () or custom function?
7 Answers Sorted by: 84 str_random ( Str::random ()) tries to use openssl_random_pseudo_bytes which is a pseudo random number generator optimized for cryptography, not uniqueness. If openssl_random_pseudo_bytes is not available, it falls back to quickRandom ():
[Solved] Generate random number in Laravel
Generate random number in Laravel Generate random number in Laravel 88,054 Solution 1 If you want to generate the random string like you said, replace: $string = str_random (15); with
How to Generate Random Number in PHP
In many case, we may require to generate random number in PHP. It may be testing purpose, or may be id or number generation, or may be simply load testing. In PHP we can easily generate random number easily by using function. The basic structure of the function to generate random number is: rand() or rand(min, max)
Laravel Generate Random Unique Number Example
If you want to generate random 6 digit number then i will give you simple and easy example with solution and output. we will learn how to generate random unique number in laravel. Here, i will give you two example where you can generate 4, 6, 8, 10 digit random number with laravel. you can also use this example with laravel 6, laravel 7 and ...
PHP program to generate random phone number
Use accurate and meaningful names for functions and variable to improve readability. Condense your numeric loop conditions into a for loop versus while loop.; Avoid declaring single-use variables.
Laravel
Within the Closure, which serves as the factory definition, you may return the default test values of all attributes on the model. The Closure will receive an instance of the Faker PHP library, which allows you to conveniently generate various kinds of random data for testing.. You may also create additional factory files for each model for better organization.
Helpers
Helpers - Laravel 10.x - The PHP Framework For Web Artisans. function returns the fully qualified path to your application's directory. You may also use the function to generate a fully qualified path to a given file within the application's configuration directory: function returns the fully qualified path to your application's directory.

Numbers and Strings #

randomDigitNot #

randomDigitNotNull #

randomNumber #

randomFloat #

numberBetween #

randomLetter #

randomElements #

randomElement #

randomKey #

How to Generate Random Unique Number in Laravel?

Hardik Savani

We are Recommending you

Popular Posts

Latest Posts

Laravel Generate 4,6,8,10 Digit Unique Random Number Example

Generate 4,6,8,10 Digit Unique Random Number in PHP Laravel

rand_int() function

Parameters of random_int() function

Generate 4 digit unique random number in laravel

Generate 6 digit unique random number in laravel

Recommended Laravel Posts

Author Admin

Leave a Reply Cancel reply

Generate Unique Random Numbers in Laravel

How to generate random numbers from a pool of numbers in Laravel

What is the random() method?

Example explained

Search code, repositories, users, issues, pull requests...

Saved searches

Licenses found

Sign In Required

Launching GitHub Desktop

Launching Xcode

Launching Visual Studio Code

Latest commit

Installation

Contributing

Security Vulnerabilities

Contributors 3

Description

Return Values

User Contributed Notes 4 notes

Generate Unique Random Number And String In Laravel

PHP Tutorial

Definition and Usage

Parameter Values

COLOR PICKER

Report Error

Thank You For Helping Us!

Top Tutorials

Laravel 10 - How to Generate Fake Data with Laravel's Faker Library

Table of Contents

Tanvir Ahmed Hera

Random Stories

Collectives™ on Stack Overflow

Laravel str_random() or custom function?

7 Answers 7

Your Answer

Not the answer you're looking for? Browse other questions tagged string function random laravel uuid or ask your own question .

Hot Network Questions

Generate random number in Laravel

Implementation

Related videos on Youtube

How to Generate Random Number in PHP

Hello developers, in this short tutorial, we will learn how to generate random number in PHP.

Editorial Staff

How to Calculate Age in PHP

Create a Simple Queue System in PHP

PHP String to Array Conversion with Examples – 4 Easy Ways

Laravel Generate Random Unique Number Example

You might also like...

Related Posts

Latest Posts

Stack Exchange Network

PHP program to generate random phone number

Your Answer

Not the answer you're looking for? Browse other questions tagged php random or ask your own question .

Hot Network Questions

Introduction