title: getting cron specific pid
body: <p>I am working on a system where i would like to create and destroy cronjobs.
  Now when i create the following cronjobs for example:</p>
  
  <pre><code>1****    /path/users.php?id=2
  1****    /path/users.php?id=3
  </code></pre>
  
  <p>Then i would like to kill the first cronjob users.php?id=2
  I am wondering if each cron creates a specific processid (PID) through unix and if so, how can i catch this specific processid?</p>
  
  <p>I have tried the <code>echo $$</code> command however, i doubt that this command generates this specific Cron PID.</p>