phpqrcode不能输出二维码，phpqrcodeheader('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();
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