Using Phpqrcode does not correctly generate QR code problems

Receives the data sent by the client, adds this data as a parameter to the URL, and then generates a QR code for the URL. A QR code can be generated, but the URL of the generated QR code does not have the parameters I want.

The code is as follows

$param_str = urldecode($_POST['data']);$param_str = base64_encode($param_str);$url = "http://www.example/order_add.php?data=".$param_str;//url1是将参数直接写入URl中//$url1 = "http://www.example/order_add.php?data=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";//这个生成二维码链接中data参数为空echo QRcode::png($url);//这样却可以生成正确的二维码//echo QRcode::png($url1);//$url与$url1恒等比较过为1，两者编码相同都为ASCII

The approximate estimate is that there is a problem when the parameter is passed, but I don't know how to troubleshoot.

In addition, it can generate the correct QR code.

//手动赋值$param_str$param_str = "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";$url = "http://www.example/order_add.php?data=".$param_str;echo QRcode::png($url);//增加路径//增加路径的话会生成实体的图片文件，如果有多人同时访问，前者就会被覆盖。所以不适合实际用QRcode::png($url,"order_qr.png");*/

Reply content:

Receives the data sent by the client, adds this data as a parameter to the URL, and then generates a QR code for the URL. A QR code can be generated, but the URL of the generated QR code does not have the parameters I want.

The code is as follows

$param_str = urldecode($_POST['data']);$param_str = base64_encode($param_str);$url = "http://www.example/order_add.php?data=".$param_str;//url1是将参数直接写入URl中//$url1 = "http://www.example/order_add.php?data=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";//这个生成二维码链接中data参数为空echo QRcode::png($url);//这样却可以生成正确的二维码//echo QRcode::png($url1);//$url与$url1恒等比较过为1，两者编码相同都为ASCII

The approximate estimate is that there is a problem when the parameter is passed, but I don't know how to troubleshoot.

In addition, it can generate the correct QR code.

//手动赋值$param_str$param_str = "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";$url = "http://www.example/order_add.php?data=".$param_str;echo QRcode::png($url);//增加路径//增加路径的话会生成实体的图片文件，如果有多人同时访问，前者就会被覆盖。所以不适合实际用QRcode::png($url,"order_qr.png");*/

Own solution, only found the wrong place, did not find why.
This problem is the client with jquery $.ajax passed the parameters, resulting in phpqrcode can not be obtained (the server is actually obtained data, Phpqrcode in the previous step of encoding, the URL is correct), the client can be replaced with form form submission.

jquery Ajax operation does not need urldecode ah, in fact, the general use of UrlEncode, the browser will automatically decode.
If you try, it's not the reason why you can't get the parameters.

