CURLOPT_POST是否需要具有后字段数或只有1 / true？

Question

I've seen curl_setopt($ch, CURLOPT_POST, 1); mostly written in this way but have noticed that some people express the count() number of post fields instead of 1 / true . Why might they be doing this or could it simply be a misunderstanding of the option?

Answer 1

From the documentation :

A parameter set to 1 tells libcurl to do a regular HTTP post. This will also make the library use a "Content-Type: application/x-www-form-urlencoded" header. (This is by far the most commonly used POST method).

Seems to me like it's a boolean. The content-type is enforced for POST requests to be sent properly, which are already default that way in HTML forms that use POST, but not in cURL requests - they have to be set up for it (so this flag is the equivalent of method="post" or method="get" depending on which value you give it, >=1 or 0 respectively.

The reason you saw count($data) in this field in some places is to (in my assumption) disable POST when the $data is empty dynamically, so it's 0 when it is empty and >=1 otherwise.