TCPDF ERROR: [Image] Unable to get image

We had problems with the way connections were handled in our linux "example.com" server. So this lead us to try on the server:

curl -v http://www.example.com/image.jpg

Whenever TCPDF tried to download an image with curl, the image was not found, nevertheless, we could view the image by just opening it directly in the browser (e.g. http://www.example.com/image.jpg).

We solved the problem by setting the example.com VirtualHost to accept 127.0.0.1 connections and adding the line "127.0.0.1 example.com" to /etc/hosts.

Just use the image path as "images/your_image.png" instead of "http://yourdomain.com/images/your_image.png" in the PDF html.

Apparently the "fopen"-wrappers are not used by TCPDF.

If you supply the URL of an image, TCPDF tries to download it with cURL into the "cache"-directory where your TCPDF-installation is stored (you have to check what the K_PATH_CACHE-constant contains to be sure).

So I guess you have to have write permissions in this directory that the magic works. Also you need cURL enabled.