title: Warning: exec() has been disabled for security reasons
body: <p>I get this error on my page:</p>
  
  <blockquote>
    <p>Warning: exec() has been disabled for security reasons in /home/a2297145/public_html/android/index.php on line 2036</p>
  </blockquote>
  
  <p>Here's the code:</p>
  
  <pre><code>//
  // Determine the size of a file
  // 
  public static function getFileSize($file)
  {
      $sizeInBytes = filesize($file);
  
      // If filesize() fails (with larger files), try to get the size from unix command line.
      if (EncodeExplorer::getConfig("large_files") == true || !$sizeInBytes || $sizeInBytes &lt; 0) {
          $sizeInBytes=exec("ls -l '$file' | awk '{print $5}'");
      }
      return $sizeInBytes;
  }
  </code></pre>
  
  <p>Can you help me to solve this?</p>