title: How to enable shell_exec() function in CentOS 5.6?
body: <p>I am using CentOS 5.6.</p>
  
  <p>When I google to find the answer about how to enable <code>shell_exec()</code> in CentOS 5.6 they answer as the following:</p>
  
  <pre><code># nano /etc/php.ini
  </code></pre>
  
  <p>remove shell_exec from the <code>disable_functions</code> list. But in my php.ini file shows the following:</p>
  
  <pre><code>disable_functions = 
  </code></pre>
  
  <p>How can I enable <code>shell_exec()</code> function in CentOS 5.6?</p>