title: keep a php script running all the time
body: <p>I need to keep a php script running and alive on my server, the script runs and checks a DB for record, processes if needed, sleeps for 3 and then loops to the top of the script in an infinite loop. The issue is launching it, if I launch it via terminal (its running on an ubuntu system) using php script.php then if the terminal session is ended the script stops running.</p>
  
  <p>So how can I go about launching the script so that it will remain running in the background. </p>
  
  <p>Furthermore if I set up a cron job that runs once an hour and fires off a different script that check the primary one is still running and if not restarts it, how would I get the this checker script to check that the initial script is still running (even if its in sleep).</p>
  
  <p>Any assistance will be greatly appreciated</p>