title: gmmktime(): You should be using the time() function instead
body: <p>What is the reason of the following error? How to solve the issue?</p>
  
  <pre><code>gmmktime(): You should be using the time() function instead
  </code></pre>
  
  <p>The issue in the line number 90:</p>
  
  <pre><code> 89         date_default_timezone_set("GMT");
   90         $time = gmmktime();
  </code></pre>