+- CodeIgniter Forums (https://forum.codeigniter.com)
+-- Forum: Using CodeIgniter (https://forum.codeigniter.com/forumdisplay.php?fid=5)
+--- Forum: General Help (https://forum.codeigniter.com/forumdisplay.php?fid=24)
+--- Thread: Programmaticaly clear webpage cache (/showthread.php?tid=87969)
Programmaticaly clear webpage cache - sjender - 06-28-2023
Hi
I am using webpage caching and it works perfect. But I want to be able to clear the cache on a per page basis.
Is there a way of doing this without manually search and delete the file?
RE: Programmaticaly clear webpage cache - kenjis - 06-29-2023
Why do you need to delete?
RE: Programmaticaly clear webpage cache - sjender - 06-29-2023
For when the content changes before cache expiry
RE: Programmaticaly clear webpage cache - kenjis - 06-29-2023
There is no easy way. You need to write code for it.
See cachePage() in system/CodeIgniter.php
In CI3 there is a method to delete cache:
$this->output->delete_cache()
https://codeigniter.com/userguide3/general/caching.html#deleting-caches
But it seems there is no method in CI4:
https://codeigniter4.github.io/CodeIgniter4/general/caching.html#deleting-caches
RE: Programmaticaly clear webpage cache - sjender - 06-29-2023
Thanks.
One last question.
Is there some sort of table somewhere which matches the cache file with the right url?
I assume CI doesnt loop through all the cached files to see which one to use.
RE: Programmaticaly clear webpage cache - kenjis - 06-29-2023
Cached data does not have URI, CI generates a cache key from URI.
See https://github.com/codeigniter4/CodeIgniter4/blob/b1b5544a75e2ed1637fed7ab74ee3d4de604b8f9/system/CodeIgniter.php#L762
RE: Programmaticaly clear webpage cache - sjender - 06-29-2023
I understand.
But how does CI knows which file to render?
The filenames are random.
RE: Programmaticaly clear webpage cache - kenjis - 06-29-2023
They are not random.
The cache key (= filename) is the md5 hash for the current URI.
RE: Programmaticaly clear webpage cache - sjender - 06-29-2023
Thanks,
Solved it by doing:
PHP Code:
@unlink(WRITEPATH.'/cache/'.md5(base_url($slug)));
Whenever I update a page
RE: Programmaticaly clear webpage cache - kenjis - 06-29-2023
I found this post: https://forum.codeigniter.com/showthread.php?tid=76772