title: How to set cron job manually on a shared host
body: <p>I'm on a shared hosting plan at Bluehost and set up cron jobs through the cpanel cron job tab.  I'm able to specify the periodicity and issue a command to trigger the php script.  Is there a way from PHP to issue a cron job and set the periodicity and also from PHP to remove the cron job?  Could someone provide a simple example?  Thanks</p>