How does the execution of scripts via Cron jobs differ when run by cron, nobody, or root users on the server?

When executing scripts via Cron jobs, the user running the script can affect its permissions and access to resources. Running the script as the "nobody" user may limit its access to certain files or directories compared to running it as the "root" user, which has full privileges. It's important to consider the necessary permissions and privileges when setting up Cron jobs to ensure the script runs smoothly.

// Example of running a script via Cron job as the root user
// This will give the script full privileges to access resources on the server
// Make sure to adjust the path to the script and the timing as needed
exec("sudo crontab -e");
// Add the following line to the crontab file
// * * * * * root /usr/bin/php /path/to/your/script.php