php实现高效获取图片尺寸的方法(2)

$url='http://www.xxxx.com/images/1331189004_28093400.jpg';
$image_content = file_get_contents($url);
$image = imagecreatefromstring($image_content);
$width = imagesx($image);
$height = imagesy($image);
echo $width.'*'.$height."nr";