title: PHP exec: hangs, doesn't continue to next line
body: <p>I have a php file 'run.php' which I'm running from the terminal. Within this file I have the following lines:</p>
  
  <p>exec("open-crawlers $port 2>&amp;1",$out,$code);
     echo 'hello';</p>
  
  <p>The problem that I'm having is that the terminal hangs after executing the 'exec' command; the program doesn't reach the second line.</p>