Curl returns a null string and curl_error also returns null

Question

The code i've used is

            $request = 'sales='.$_slots['sales']['value'].'&duration='.$_slots['duration']['value'];
            $ch = curl_init();
            curl_setopt( $ch,CURLOPT_URL, $url );
            curl_setopt( $ch,CURLOPT_POST, 2 );
            curl_setopt( $ch,CURLOPT_RETURNTRANSFER, true );
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,false);
            curl_setopt( $ch,CURLOPT_SSL_VERIFYPEER, false );
            curl_setopt( $ch,CURLOPT_POSTFIELDS, $request);
            $result = curl_exec($ch );
            $response = explode(chr(10),$result);
            $data = implode('', $response);
            $error = curl_error($ch)
            curl_close( $ch );

The curl_error also returns null so I have no way to track why its not working. The $url is defined above and is a valid url.I also tried without sending any post but still it does not work.

Any advice would be appreciated.Thanks

where is curl_error() code in your question? also what is your url? — Death-is-the-real-truth
– Death-is-the-real-truth, Commented Jul 25, 2017 at 9:41
Also is your $request variable properly URL encoded, there is a function http_build_query() for that — Peter Featherstone
– Peter Featherstone, Commented Jul 25, 2017 at 9:42
i had used the curl_error but i removed it since it returns null — Saeesh Tendulkar
– Saeesh Tendulkar, Commented Jul 25, 2017 at 9:44

Sean Fahey · Accepted Answer · 2018-11-13 17:26:13Z

1

In my case, curl was only showing this behavior on https URLs, whether CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER are set to false for testing, or not, just as you have here.

I had recently run a yum update which updated Name Service Switch, which was the only change to the server I could think of. I updated via yum on another server, and that server started to show the same failure in curl.

Restarting the Apache service resolved the issue. Https URLs worked in curl after this restart.

I did find examples of curl/ssl/nss errors occurring in the past, but in my case never saw an error message.

This isn't a very satisfying resolution because I don't feel like I have a full picture of why this failure occurred, so I will continue to investigate and add an update if I find something more.

answered Nov 13, 2018 at 17:26

Sean Fahey

1,9023 gold badges27 silver badges38 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Sean Fahey Over a year ago

@SaeeshTendulkar the point is, an update caused a problem with Apache that required it to be restarted, as soon as the update was applied. What was your resolution?

Collectives™ on Stack Overflow

Curl returns a null string and curl_error also returns null

1 Answer 1

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related