PHP: Human-readable Random String

readable_random_string.php

<?php

/**
 * Generates human-readable string.
 *
 * @param string $length Desired length of random string.
 * 
 * retuen string Random string.
 */ 
function readable_random_string($length = 6)
{  
    $string     = '';
    $vowels     = array("a","e","i","o","u");  
    $consonants = array(
        'b', 'c', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'm', 
        'n', 'p', 'r', 's', 't', 'v', 'w', 'x', 'y', 'z'
    );  

    $max = $length/2;
    for ($i = 1; $i <= $max; $i++)
    {
        $string .= $consonants[rand(0,19)];
        $string .= $vowels[rand(0,4)];
    }

    return $string;
}