Mandrill PHP unable to get local issuer SSL certificate

Question

I've installed the Mandrill PHP API on my Windows Apache server. When trying to send an email using the code below I get the error:

Mandrill_HttpError - API call to messages/send-template failed: SSL certificate problem: unable to get local issuer certificate

It's not clear to me how Mandrill connects to my local issuer certificate. My web server does have a valid certificate and can display HTTPS pages successfully.

Any ideas?

        $mandrill = new Mandrill('MyMandrillAPIKey');

        $message = array(
            'subject' => 'Test message',
            'from_email' => 'MyEmailAddress',
            'html' => '<p>this is a test message with Mandrill\'s PHP wrapper!.</p>',
            'to' => array(array('email' => 'MyEmailAddress', 'name' => 'David Splat')),
            'merge_vars' => array(array(
                'rcpt' => 'MyEmailAddress',
                'vars' =>
                array(
                    array(
                        'name' => 'FIRSTNAME',
                        'content' => $fName),
                    array(
                        'name' => 'LASTNAME',
                        'content' => $lName)
            ))));

        $template_name = 'MyTemplateName';

        $template_content = array(
            array(
                'name' => 'main',
                'content' => 'Hi *|FIRSTNAME|* *|LASTNAME|*, thanks for signing up.'),
            array(
                'name' => 'footer',
                'content' => 'Copyright 2014.')

        );

        print_r($mandrill->messages->sendTemplate($template_name, $template_content, $message));

    } catch(Mandrill_Error $e) {
        // Mandrill errors are thrown as exceptions
        echo 'A mandrill error occurred: ' . get_class($e) . ' - ' . $e->getMessage();
        throw $e;
    }

Answer 1

You don't need to turn off curl SSL option, instead you can download the cacert.pem file from http://curl.haxx.se/docs/caextract.html and then include it in either php.ini file curl.cainfo="/exact/location/to/cacert.pem"

or simply change the lines in Mandrill.php file to use it as below.

curl_setopt ($this->ch, CURLOPT_SSL_VERIFYPEER, TRUE); 
curl_setopt ($this->ch, CURLOPT_CAINFO, __DIR__ . "/cacert.pem")

link to the post http://tutewall.com/ssl-certificate-problem-unable-to-get-local-issuer-certificate/

Answer 2

Here is a change that fixed my problem. In Mandrill.php add these two lines after the call to curl_init():

curl_setopt($this->ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($this->ch, CURLOPT_SSL_VERIFYPEER, 0);

This approach was suggested by one of the answers at error in send email using Mandrill (php)