php去除html代码中img图片标签宽高

function content_strip($content){
	$content = preg_replace('/<img[^>]*src=http://www.52419.net/skin/s11/image/nopic.gif>,"wap_img('$1')",$content);
	return $content;
}
function wap_img($url){
	$img='<img src=http://www.52419.net/skin/s11/image/nopic.gif>.$url.'">';
	return $img;
}