Random String (PHP)

random_string.php

<?php

/**
 * Create a random string $l characters in length.
 * 
 * @link http://www.php.net/manual/en/ref.strings.php#84888
 * @param int $l number of characters (default: 10)
 * @return string the random string
 */
function random_string($l = 10) {
    $c = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxwz0123456789";
    $s = '';
    for(;$l > 0;$l--)
        $s .= $c{rand(0,strlen($c))};
    return str_shuffle($s);
}