No support for wp_cache_flush_group()

[UVLabs]

The plugin has no support for wp_cache_flush_group():

https://developer.wordpress.org/reference/functions/wp_cache_flush_group/

This is explicitly defined inside this file here: https://github.com/litespeedtech/lscache_wp/blob/master/src/object.lib.php#L331

It's been years since WP added this wp_cache_flush_group(); function...when is this expect to be included?

This affects my workflow because on sites where I have custom plugins, I need to disable the litespeed plugin and install W3 Total Cache simply because sometimes the cache keys I create are dynamic, and the values used to create them are not always available in methods where I would want to clear those cache keys.

Being able to clear the entire group is far more efficient. Any plans on this?

[timotei-litespeed]

@UVLabs Did you added an answer/created the topic: https://wordpress.org/support/topic/wp_cache_supports-flush_group/ ?

[UVLabs]

@timotei-litespeed So then can we get this merged? There's way too many changes happening in that pull request to reasonably ask users to manually add the changes to the plugin...

Its almost a year since that pull request was opened @hi-hai

[hi-hai]

@timotei-litespeed Can you work w/ OP and make sure the PR tested? We can merge this into v7.4

[timotei-litespeed]

@UVLabs I will remake the PR and share it with you. We will work together on testing it

[UVLabs]

@timotei-litespeed You can ping me on the updated pull request when done... also let me know how to build the plugin files for production or even better...provide a built zip so i can download

[timotei-litespeed]

@UVLabs OK :)
For all sites we have LSC => Tolbox => Beta test where commits or version can be tested.

I started working here: https://github.com/timotei-litespeed/lscache_wp/tree/OC-improvements

BUT! is note tested!
Please do not use it for now

[timotei-litespeed]

@UVLabs please test with this implementation. timotei-litespeed@eb6900b
Added some Debug messages, which I will remove later.

[UVLabs]

@timotei-litespeed I can't explain it...But I did a small test on a site with both LSC 7.2 and 7.3 without using your commit, and wp_cache_flush_group seems to be working from the test i did...

I'm looking at the LSC code for v7.3 and it's explicitly stating that it does not have support, yet when I run the test code, WP is not returning false for wp_cache_supports( 'flush_group' )

Here's the test snippet I used:

function sl_cc_test(){
	
	if ( wp_cache_supports( 'flush_group' ) === false ) {
            file_put_contents(ABSPATH . 'log.txt', "no support\n\n", FILE_APPEND);
	}else{
	   file_put_contents(ABSPATH . 'log.txt', "has support\n\n", FILE_APPEND);
	}
	
	  wp_cache_set('testing', 'hello there', 'lsc_group', DAY_IN_SECONDS);

           // Uncomment line below to test cache flush
          // wp_cache_flush_group('lsc_group');

       $cache =  wp_cache_get('testing', 'lsc_group');
	
        if( $cache !== false ) {
            file_put_contents(ABSPATH . 'log.txt', "cache hit\n\n", FILE_APPEND);
        }else{
            file_put_contents(ABSPATH . 'log.txt', "cache miss\n\n", FILE_APPEND);
        }
	
}
add_action('admin_head', 'sl_cc_test');

The log file hows "has support" and when I uncomment the cache flush line, it shows cache miss. So it seems like the cache group is getting cleared somehow...I can't explain whats causing it if LSC specifies no support. I tested from a Namecheap hosting which installs the LSC plugin by default through Softaculous.

Any ideas why its working?