How to Generate Random Number in PHP

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:

rand()

or 

rand(min, max)

So lets check these out with example:

<?php
echo(rand() . "<br>"); // This will print a random number
echo(rand(1,50). "<br>"); // This will print a random number between 1 and 50
echo(rand(1000,9999). "<br>"); // This will print a random number between 1000 and 9999
?>

Output:

1801702658
48
6028

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.

<?php

$no_of_digits = 100;

$var='';

for($i=1; $i <= $no_of_digits; $i++){

$var .=rand(0,99).'<br>';

}
echo "<br>Random Value = <br> $var";

?>

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.

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