PHP ereg problem

Question

I upgraded to PHP 5.3 and i got the error: ereg has been deprecated.

What can i use to replace this??

function CheckIfAlphaNumberic($text) {
    if (ereg('[^A-Za-z0-9]', $text)) {
        unset ($text);
    }
    return $text;
}

Answer 1

You can use preg_match():

function CheckIfAlphaNumberic($text){
    if (preg_match('#[^A-Za-z0-9]#', $text)) {
        unset ($text);
    }
    return $text;
}

See also: Switching From ereg to preg

Furthermore, you may use return null; instead of unset ($text);