Good alternative to eregi() in PHP

Question

I often find myself doing quick checks like this:

if (!eregi(\'.php\', $fileName)) {
    $filename .= \'.php\';
}

But as eregi() was deprec

Answer 1

if (! stristr($fileName, '.php')) $filename.='.php';

moff's answser had the parameters backwards.

http://php.net/manual/en/function.stristr.php