How can I run a script more often than cron allows?

Question

Task Schedulers

There is a php script that needs to be run every 30 minutes, but hosting allows you to configure cron to run a maximum of once every 1 hour.
How can this limitation be bypassed?

Answer 1

If you do not need to run through the cli, then as an option: cron-job.org

Answer 2

generally through a timeout, but you apparently have PCP
then through pain and external cron