How can PHP scripts be executed as a service or program at server startup for efficient image generation without overloading the server?

To execute PHP scripts as a service or program at server startup for efficient image generation without overloading the server, you can use a task scheduler like cron jobs to run the PHP script at specific intervals. This will distribute the workload and prevent simultaneous execution of multiple instances of the script, reducing server overload.

// Example cron job entry to run PHP script every hour
0 * * * * /usr/bin/php /path/to/your/script.php