lcfirst function is missing from php < 5.3

[Attila Fülöp]

Could be easily added:

if (!function_exists('lcfirst')) {
    function lcfirst($string) {
        return substr_replace($string, strtolower(substr($string, 0, 1)), 0, 1);
    }
}

The best is to create a separate check if php < 5.3 then include compatibility52.php, or something like that