Use PHP to create, edit and delete crontab jobs?

Question

Is it possible to use PHP to create, edit and delete crontab jobs?

I know how to list the current crontab jobs of the Apache user:

$output = shell_ex         


        

Answer 1

This should do it

shell_exec("crontab -l | { cat; echo '*/1    *    *    *    *    command'; } |crontab -");