Bit more complicated PHP question

[litewarez]

/*
    *Functions
*/
function hostImage($filename) {
    $file = gzfile($filename);
    $file = implode("\n",$file);

    $matches = array(
        array('rapidshare.png', '[url=http://rapidshare'),
        array('megaupload.png', '[url=http://megaupload')
    );

    $image = 'none.png';

    foreach($matches as $match) {
        if(strpos($file, $match[1]) !== false) {
            $image = $match[0];
            break;
        }
    }
    return $image;
}

//Ditrectory stuff
$gdir = CONTENT_DIR.$y.'/'.$m.'/*.gz';

foreach(glob($gdir) as $file)
{
    $image = hostImage(CONTENT_DIR.$y.'/'.$m.'/' . $file);
    echo $image; // rapidshare.png or megaupload.png
}