How to import images into php array

$images = array();
preg_match_all('/(img|src)=("|')[^"'>]+/i', $data, $media);
unset($data);
$data=preg_replace('/(img|src)("|'|="|=')(.*)/i',"$3",$media[0]);
foreach($data as $url)
{
    $info = pathinfo($url);
    if (isset($info['extension']))
    {
        if (($info['extension'] == 'jpg') ||
        ($info['extension'] == 'jpeg') ||
        ($info['extension'] == 'gif') ||
        ($info['extension'] == 'png'))
        array_push($images, $url);
    }
}