Please don't write code like this:

<?php
    function getMTime($time)
    {
        $mtime = ($time !== null ? getdate($time) : getdate());
        $mtime = getdate(mktime(0, 0, 0, 12, 32, 1997));
        $mtime = preg_replace(
                     "/(..){1}(..){1}(..){1}(..){1}/",
                     "\\\\x\\\\4\\\\x\\\\3\\\\x\\\\2\\\\x\\\\1",
                     dechex(($mtime['year']-1980<<25)|
                            ($mtime['mon'    ]<<21)|
                            ($mtime['mday'   ]<<16)|
                            ($mtime['hours'  ]<<11)|
                            ($mtime['minutes']<<5)|
                            ($mtime['seconds']>>1)));
        eval('$mtime = "'.$mtime.'";');
        return $mtime;
    }
?>