title: Sending signal to daemon in php
body: <p>I have a daemon written in PHP which is running on my linux machine.</p>
  
  <p>I am trying to send a signal to it through another php file.
  For this purpose I am trying posix_kill function. But its not working.</p>
  
  <p>When I run the php page, I get an error that php is compiled without --enable-grep</p>
  
  <p>I want to know how to enable it? OR what is the alternate way of sending signal to daemon?</p>