Php curl common errors: SSL errors, bool (false)

Symptom: An error occurred while calling https in php curl.

Troubleshooting method: Use curl in the command line to call it.

Cause: The SSL certificate cannot be verified in the server room.

Solution: Skip the SSL certificate check.

The code is as follows:
Curl_setopt ($ ch, CURLOPT_SSL_VERIFYPEER, false );

Symptom: php curl calls curl_exec and returns bool (false). The command line curl call is normal.

Troubleshooting:

Var_dump (curl_error ($ ch ));

Return value:

String (23) "Empty reply from server"

Troubleshoot:

The code is as follows:
Curl_setopt ($ ch, CURLOPT_HEADER, true ); Curl_setopt ($ ch, CURLOPT_RETURNTRANSFER, false );

Return value:

HTTP/1.1 100 Continue
Connection: close

Cause: php curl ends when it receives HTTP 100. It should continue to receive HTTP 200.

Solution:

The code is as follows:
Curl_setopt ($ ch, CURLOPT_HTTPHEADER, array ('CT :'));