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  1. 1

    too much php

    You are using POST method, but are you providing an array of data? E.g.

    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
  2. 2


    I used file_get_contents using stream_create_context and it works fine:

    $postdataStr = http_build_query($postdataArr);
    $context_options = array (
            'http' => array (    <blink> // this will allways be http!!!</blink>
                'method' => 'POST',
                'header'=> "Content-type: application/x-www-form-urlencodedrn"
                    . "Content-Length: " . strlen($postdataArr) . "rn"
                    . "Cookie: " . $cookies."rn"
                'content' => $postdataStr
    $context = stream_context_create($context_options);
    $HTTPSReq = file_get_contents('https://www.example.com/', false, $context);
  3. 3

    Issac Kelly

    Whenever I’m testing something with PHP/Curl, I try it from the command line first, figure out what works, and then port my options to PHP.

  4. 4


    The best way to use https and avoid security issues is to use Firefox (or another tool) and download the certificate to your server. This webpage helped me a lot, and these were the steps that worked for me:

    1) Open in Firefox the URL you’re gonna use with CURL

    2) On the address bar click on the padlock > more information (FF versions can have different menus, just find it). Click the View certificate button > Details tab.

    3) Highlight the “right” certificate in Certificate hierarchy. In my case it was the second of three, called “cPanel, Inc. Certification Authority”. I just discovered the right one by “trial and error” method.

    4) Click the Export button. In my case the one who worked was the file type “PEM with chains” (again by trial and error method).

    5) Then in your PHP script add:

    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);    
    curl_setopt($ch, CURLOPT_CAINFO, [PATH_TO_CRT_FILE]);

    In addition I’d say that we must pay attention on the fact that these steps will probably need to be redone once a year or whenever the URL certificate is replaced or renewed.

  5. 5


    I had a situation where this helped: (PHP 5.4.16 on Windows)

    curl_setopt($ch, CURLOPT_SSLVERSION, 3);
  6. 6


    Note: This is strictly not production use. If you want to quickly debug, this may be useful. Otherwise, please use @SchizoDuckie’s answer above.

    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);     
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2); 

    Just add them. It works.

  7. 7


    Just had a very similar problem and solved it by adding

    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);

    Apparently the site I’m fetching redirects to another location and php-curl doesn’t follow redirects by default.

  8. 8

    Elzo Valugi

    Sometimes you have to upgrade your Curl certificates to latest version not to have errors with https.

  9. 9


    I discovered this error on a recent application project. I was writing to run from the command line or the browser window, so I was using server detection to get the relative URL of the document I was asking for. The trouble was, the site is https, and each time I attempted to access http://(same server), cURL helpfully changed it to https.

    This works fine from the browser, but from the command-line, I’d then get an SSL error even with both verify’s set to false. What I had to do was,

    1) Check $_SERVER[‘HTTP_HOST’]. If present, use ($_SERVER[‘HTTPS’] ? “https://” : “http://”).$_SERVER[‘HTTP_HOST’]

    2) Check $_SERVER[‘COMPUTERNAME’], and if it matched the production server, provide the https URL. (“https://(servername)“)

    3) If neither condition passed, it means I’m running command-line on a different server, and use “http://localhost“.

    Now, this worked, but it’s a hack. Also, I never did figure out why on one server (https) cURL changed my URL, while on the other (also https) it left my URL alone.


  10. 10

    too much php

    You should also try checking the error messages in curl_error(). You might need to do this once after each curl_* function.


  11. 11


    I had the same problem today.
    Curl comes with an outdated file to authenticate HTTPS certificates from.

    get the new one from:


    save it into some dir on your site

    and add

    curl_setopt ($curl_ch, CURLOPT_CAINFO, dirname(__FILE__)."/cacert.pem"); 

    To every request :-)

    IGNORE any dumbass comments about disabling CURLOPT_VERIFYPEER and CURLOPT_VERIFYHOST!! That leaves your code vulnerable to man in the middle attacks!

    December 2016 edit:

    Solve this properly by using Jasen’s method mentioned below.

    add curl.cainfo=/etc/ssl/certs/ca-certificates.crt to you php.ini

    October 2017 edit:

    There is now a composer package that helps you manage the ca certificates, so that you’re not vulnerable if your cacert.pem becomes outdated due to revoking certificates.

    https://github.com/paragonie/certainty -> composer require paragonie/certainty:dev-master

  12. 12


    there might be a problem at your web hosting company from where you are testing the secure communication for gateway, that they might not allow you to do that.

    also there might be a username, password that must be provided before connecting to remote host.

    or your IP might need to be in the list of approved IP for the remote server for communication to initiate.


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