从cron作业执行脚本时，shell_exec（'crontab -l'）为空

Question

I'm trying to delete specific cron job with my PHP script. First of all I'm trying to get current cron jobs using shell_exec:

shell_exec('crontab -l');

When this script executing from webbrowser shell_exec returns all current cron jobs. But when this script executing from cron job shell_exec returns empty string. Why?

On another webhosting this works fine, but here I have this issue. I tried to find the reason or solution, tried different ways but didn't found any working solution.

Answer 1

You must put the entire path of the command, in this case, the path of crontab. Because when the crontab executes their jobs, there is no environment variable $PATH to look for binaries