On Linux, a cron job can be used. The command to run is php followed by the full path to /booked/Jobs/jobs.php.
An example cron configuration might look like: * * * * * php -f /home/yourhost/public_html/Jobs/jobs.php
If you have access to cPanel through a hosting provider, setting up a cron job in cPanel is straightforward. Either select the Every Minute option from the Common Settings menu, or enter * for minute, hour, day, month and weekday.
On Windows, a scheduled task can be used. The task must be configured to run at a frequent interval – at least every 5 minutes. The task to execute is php followed by the full path to Booked\Jobs\jobs.php. For example, c:\PHP\php.exe -f c:\inetpub\wwwroot\Booked\Jobs\jobs.php
Scheduled jobs must be run once per minute.