FPDF error: Could not include font definition file in PHP

Question

I have bunch of images and I want to generate PDF of of all those images. I am using FPDF library (version 1.7) for achieving this. But I am getting the following e

Answer 1

I had this kind of problem and my issue was that I was using a linux web server and I made the mistake of not using the correct case in my references to my font files. After I changed "Arial" to "arial" the problem was resolved.