getimagesize Alternative (Faster alrternate Method)

getimagesizealt.php

function getimagesizeAlt($image_url) {

            $handle = fopen($image_url, "rb");
            $contents = "";
            if ($handle) {
                do {
                    $count += 1;
                    $data = fread($handle, 8192);
                    if (strlen($data) == 0) {
                        break;
                    }
                    $contents .= $data;
                } while (true);
            } else {
                return false;
            }
            fclose($handle);

            $im = ImageCreateFromString($contents);
            if (!$im) {
                return false;
            }
            $gis[0] = ImageSX($im);
            $gis[1] = ImageSY($im);

            $gis[3] = "width={$gis[0]} height={$gis[1]}";
            ImageDestroy($im);
            return $gis;
}