header(‘Content-Type: image/png‘); include_once ‘phpqrcode/qrlib.php‘; $a = "http://www.play17.cn/play/wlogin.html"; ob_clean(); QRcode::png($a);
加入输出类型
header(‘Content-Type: image/png‘);
清除缓存ob_clean()
ob_clean();
原文：http://www.cnblogs.com/u0mo5/p/4950406.html