Is it possible to force Typo3 to refresh websites by an external trigger (e.g. web server cron job or manual trigger)? Could you please describe some best practices?
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3 Answers
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Please have a look at Scheduler.
The Scheduler is designed to be the central place to manage all kind of tasks that need to be executed on a regular basis, without needing someone to actually press a button.
If no existing task fits your needs, you can create an own task.
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If refreshing means recreating the frontend cache then you could use
config.cache_clearAtMidnight = 1
This will invalidate all FE-Cache entries at midnight, see https://docs.typo3.org/typo3cms/TyposcriptReference/Setup/Config/Index.html#cache-clearatmidnight for documentation.
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If you need to clear the Front End cache, due to external changes to content or whatever, you could use the cache manager from the system extensions and build a small swapper extension to clear specific or all page caches. To go through the framework, you would add a task that can be inserted into the planner in the back end. The planner then would be called by a cron job.
I remember an existing extension for that but I don't remember the exact name right now. However, setting a new one up only requires little code (and helps immensely understanding the caching mechanism).
