/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 15-1-5
 * Time: 下午12:55
 */
$url = 'http://zxing.org/w/decode?u=http%3A%2F%2Fwww.kuitao8.com%2Fuploads%2FQR%2F8e57f27c52289a0fe116c8df7ea8a671.png';
$code = file_get_contents($url);
preg_match("/<table id=\"result\">(.*)<\/table>/isU",$code,$math);
preg_match("/<pre>(.*)<\/pre>/isU",$math[1],$maths);
echo $maths[1];
/**
 *
 *
 * 结果http://www.kuitao8.com/qr/index
 */