how to output random string of letters in php code example

Example 1: PHP random string generator

function generateRandomString($length = 25) {
    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
    $charactersLength = strlen($characters);
    $randomString = '';
    for ($i = 0; $i < $length; $i++) {
        $randomString .= $characters[rand(0, $charactersLength - 1)];
    }
    return $randomString;
}
//usage 
$myRandomString = generateRandomString(5);

Example 2: Generate Random String in PHP

phpCopy<?php
 
echo "Out1: ",substr(md5(time()), 0, 16),"\n";
 
echo "Out2: ",substr(sha1(time()), 0, 16),"\n";
 
echo "Out3: ",md5(time()),"\n";
 
echo "Out4: ",sha1(time()),"\n";
 
?>

Example 3: Generate Random String in PHP

phpCopy<?php
 $x = 0;
 $y = 10;
$Strings = '0123456789abcdefghijklmnopqrstuvwxyz';
echo "Gen_rand_str: ",substr(str_shuffle($Strings), $x, $y), "\n";

$a = 0;
$b = 20;
$Strings='0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
echo "Gen_My_Pass: ",'hello.'.substr(str_shuffle($Strings), $a, $b).'.World',"\n";
?>