title: Fatal error: Can't use function return value in write context
body: <p>Error:</p>
  
  <blockquote>
    <p>Fatal error: Can't use function return value in write context in /home/u566013465/public_html/2/inc/functions.php on line 2361
    line 2361:</p>
  </blockquote>
  
  <pre><code>if( empty( shell_exec("which $command") ) ) {
      return false;
  }
  
  if( $config['debug'] ) {
      $start = microtime(true);
  }
  </code></pre>
  
  <p>I have <code>PHP 5.3</code></p>