为什么urlencode数据要通过curl发布，为什么不对表单做同样的事情呢？

Question

As stated on php manual urlencode is for encoding query part of url, so why should urlencode be used to encoded data before sending via curl too as these are $_POST values and not query part?

    foreach ($data as $key => $value) {
             $value = urlencode($value);
             $req .= "&$key=$value";
    }
    //
    curl_setopt($ch, CURLOPT_POSTFIELDS, $req);

If this is recommended to do, so why this is not necessary to encode posted data via form before processing a submitted form (not for curl, but just processing form I mean.) ?

Does this mean curl is sending data differently than a submitted form does?

Answer 1

You can do:

curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

instead of the foreach loop. When you give an array, the parameters are posted using multipart/form-data encoding.

You shouldn't call urldecode in the processing form, because PHP automatically decodes the parameters before putting them into $_GET or $_POST.