What are the limitations of using PHP alone for scheduling tasks?

Using PHP alone for scheduling tasks can be limited as it relies on user interaction or server requests to trigger the tasks. To overcome this limitation, you can use a server-side scheduler like cron jobs to automate the execution of tasks at specified intervals without user intervention.

// Example of a cron job that runs a PHP script every day at midnight
0 0 * * * /usr/bin/php /path/to/your/script.php