What is the purpose of using a Cronjob in PHP and what potential issues can arise when setting up recurring tasks?

The purpose of using a Cronjob in PHP is to schedule and automate recurring tasks, such as sending emails, updating database records, or running maintenance scripts. One potential issue that can arise when setting up recurring tasks is ensuring that the Cronjob is properly configured to run at the desired intervals and that the PHP script being executed is error-free.

// Example of setting up a Cronjob in PHP to run a script every day at midnight
// Add the following line to your crontab file (crontab -e):
// 0 0 * * * /usr/bin/php /path/to/your/script.php

// script.php
<?php
// Your PHP script logic here
echo "This script runs every day at midnight.";