title: 500 Internal Server error during creating PDF Files using MPDF php
body: <p>i am using MPDF for generating Multiple PDF Files in PHP in a loop.
  Some of PDF Files are so big for that purpose in a loop i have also define PHP functions for increase time limit etc. </p>
  
  <pre><code>ini_set('max_execution_time', 0);
  ini_set("memory_limit", "512M");
  set_time_limit(0);
  </code></pre>
  
  <p>But still it show me an 500 internal server error on server, works fine on local</p>