while(true) { // some code to run in the background sleep(60); // sleep for 60 seconds before running again }
if(date('G') == 0) { // code to run at midnight }This code will check the current hour using the `date` function and execute the code inside the if statement if the hour is midnight (0). This is commonly used for tasks such as sending daily reports or performing backups. Package libraries that may be used with self process in PHP include libraries for background processing such as Gearman or RabbitMQ, as well as scheduling libraries such as Cron or systemd timers.