title: Warning: require_once:Fatal error: require_once(): Failed opening required
body: <p>can someone help me for better and the simplest explaination for my problem.
  This is my problem...
  this is my coding</p>
  
  <pre><code>&lt;?php require_once('Connections/key1.php'); ?&gt;
  </code></pre>
  
  <p>can someone help??</p>