title: Calling console command within command and get the output in Symfony2
body: <p>I have a few console command in Symfony2 and I need to execute one command from another command with some parameters.</p>
  
  <p>After successfull execution of the second command <strong>I need to get the result (as an array for example)</strong>, not the display output.</p>
  
  <p>How can I do that?</p>