How to Generate Random String in PHP

In this tutorial, we are going to see how to generate a random string in PHP. We can achieve that by storing all possible letters in a string and then generate a random index from 0 to the length of the string -1. As shown in the following code.
Generate random string in php
<?php 


function getRandomStr($n) { 
    
// Store all possible letters in a string.
    
$str = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; 
    
$randomStr = ''; 
  
    // Generate a random index from 0 to the length of the string -1.
    
for ($i = 0; $i < $n; $i++) { 
        
$index = rand(0, strlen($str) - 1); 
        
$randomStr .= $str[$index]; 
    
} 
  
    
return $randomStr; 

} 


$n=25; 

echo getRandomStr($n); 


?>
Output will be:
C7sXCEsWsXZHWztywCdWtnqZm
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