I am using MPDF to generate a pdf with images. With http:// all works fine, but after changing my whole site to https:// I only get red crosses where the images should appear.
If I watch the generated file as html version, the images are all there, with https://, but in the generated PDF they are just not shown.
Any hint?
UPDATE:
Error was because of CURL
("SSL certificate problem: unable to get local issuer certificate")
It was resolved by adding curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
to mpdf.php
Answer was found here:
curl: (60) SSL certificate : unable to get local issuer certificate
Dirty Way: cURL PHP RESTful service always returning FALSE
For anyone coming here from Google - there is now a better solution. mPDF now supports setting curlAllowUnsafeSslRequests.
$mdf = new Mpdf(<your configuration>);
$mpdf->curlAllowUnsafeSslRequests = true;
This will set the CURL parameters properly for you without having to modify mPDF.
Obviously, use only in appropriate situations, as this disables SSL all verification protections.
To resolve this issue you need to remove the protocol from URL for this I have created a plugin please install it and activate.
Here is the plugin link:- https://wordpress.org/plugins/vg-protocol-removed-not-secure-connection/
If you have a root cert, it's preferable to provide it using CURLOPT_CAINFO or CURLOPT_CAPATH than to bypass validation altogether.
It is a shame mPDF isn't designed better so you could avoid modifying the library code directly.
