I have the following settings:

nginx (no apache) on http3, custom rules to serve the cached https html files (works)

preload mode running every 10 hours (works)

Expiry Time & Garbage Collection – Scheduler – Timer 600s

Cache rebuild enabled – does _not_ work.

Problem

Upon requesting a URL that is cached on the server (verified, the file exists but was created 600+s ago), wp super cache refuses to serve that file. Rather, it blocks the process, re-renders the page, and serves the newly rendered file. Verified by both changing timestamp on the html cached file, and the html content footer.

Expected

If Cache rebuild is enabled, the static html file must be served and asynchronously regenerate the html file.

removed

On our website, we have encountered an edge case where WP Super Cache occasionally serve blank pages to users.

The problem is that the wp_cache_serve_cache_file() function doesn’t check if any content was successfully read from the cache file.

This scenario only happens when external processes remove the cached files. In our case this happens from time to time because we’re using a NFS file system with two front-end servers that both access the files (the entire web root is on the NFS).

But this means that a cache file can disappear between the call to file_exists() and the call to file_get_contents(). And in this situation, the empty string is then echo’ed.

To fix this, please consider to change line 304-305 of wp-cache-phase2.php from:

echo $cachefiledata;
exit();

To something along these lines:

if ($cachefiledata === false) {
  wp_cache_debug( 'The wp-cache file could not be read. Must generate a new one.' );
  return false;
}
echo $cachefiledata;
exit();

Thanks in advance.

hi,

I have a multisite installation with eight instances, with the first being the “main” website of an ecosystem.

I need to add the the wp super cache settings capability to the editor and administrator roles in every “child” site.

at the moment wp super cache settings are not visible, nor accessible to other roles than the superadministrator.

the issue is that the “main” site has some custom post types that I make accessible to the “children” websites. once a post i created, i need the editors and administrator to access the “Delete Cache On All Blogs” button inside the settings.

I tried this code with no success:

function custom_grant_cache_access() {
  $admin_role = get_role('administrator');
  if ($admin_role) {
    $admin_role->add_cap('wp_cache_manage_options');
  }
}
add_action('admin_init', 'custom_grant_cache_access');

function custom_cache_menu_access() {
  if (current_user_can('administrator')) {
    add_menu_page('WP Super Cache', 'WP Super Cache', 'wp_cache_manage_options', 'wp-cache', '', 'dashicons-admin-generic', 56);
  }
}
add_action('network_admin_menu', 'custom_cache_menu_access');

is it possible in some way? or do you plan to update the plugin with this feature?

• comment_author_email_{HASH}
• comment_author_{HASH}
• comment_author_url_{HASH}

Hello, I am using the wp-discuz comment plugin and the data below creates a cookie and the cache is disabled. How can I include this data, which is only used by visitors, in the cache?

Hello,

I’ve been having an issue where plugin auto-updates fail and are rolled back. This occurs on any site running WordPress 6.6+ and WP Super Cache (although all are on the same server).

Disabling caching in the WP Super Cache settings fixes the issue and plugins update successfully.

Here’s an example of the error I’m seeing:

[03-Nov-2024 15:01:19 UTC] Upgrading plugin 'wordpress-seo'…
[03-Nov-2024 15:01:21 UTC] Plugin 'wordpress-seo' has been upgraded.
[03-Nov-2024 15:01:23 UTC] Scraping home page…
[03-Nov-2024 15:01:24 UTC] Loopback request failed: cURL error 18: transfer closed with outstanding read data remaining
[03-Nov-2024 15:01:25 UTC] The update for 'wordpress-seo' contained a fatal error. The previously installed version has been restored.

So it appears that when WordPress checks for fatal errors after the plugin update, a CURL error occurs and the plugin is rolled back.

Here’s an example of the log after disabling caching in the WP Super Cache settings:

[03-Nov-2024 15:04:18 UTC] Upgrading plugin 'wordpress-seo'…
[03-Nov-2024 15:04:22 UTC] Plugin 'wordpress-seo' has been upgraded.
[03-Nov-2024 15:04:24 UTC] Scraping home page…
[03-Nov-2024 15:04:24 UTC] '###### wp_scraping_result_start:b56ac8883338a6987fd6de15828e2ca6 ######
true wp_scraping_result_end:b56ac8883338a6987fd6de15828e2ca6

Is there a WP Super Cache setting that can be adjusted to fix this problem?

Thanks,

Tim

Hi,

After installing WooCommerce on my website I receive a message in all website URL on the top page: i attach it: https://snipboard.io/oBTLlh.jpg

define( 'WPCACHEHOME', '/usr/home/eclipse-sid.es/web/wp-content/plugins/wp-super-cache/' );

When I installed WooCommerce the debug mode was enabled and after was disabled… this message it seems written by the debug mode, but now is disabled.

Regards.

hello. Your plugin doesn’t apply to lazy load images?

After installing the plugin and configuring it, these messages appear in the pagespeed.web.dev tool for my site:

Defer offscreen images

Serve static assets with an efficient cache policy

Hi,

I already reported this 4 years ago and still it isn’t fixed (https://www.ads-software.com/support/topic/module-is-not-working-if-apache_request_headers-is-disabled/).

@donncha
Solution is easy -> “function_exists” should be changed to “is_callable“. (I tested it, working well). Can you update plugin? ??

The error log reports:

PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home/xxx/wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 2632
PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home/xxx/wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 889

This just started happening today, and I’ve made no changes whatsoever (other than adding a couple of new posts). The post gets published, and the site continues to work fine, but for this weird new hitch.

Hello,

Is this PHP 8.3 Compatible?

Thank you!

I am using an Astra theme. When I have simple cache turned on and after its done a preload, on occasion a cached page will not be formatted throughout the page. I have played with different settings, and even re-installed WordPress and created the site from scratch, however the issue still occurs. The issue does not occur when I have cache off. Any ideas?

Hi,

Not a developper. Trying to manage a non-profit WP site as a volunteer ??

We have been using WP Super Cache since the beginning of the time. Since last WP Super Cache update, the cache size has increased drastically. In one point, it maxed out our available shared server space at the ISP. That was 8GB of cache I had to delete to bring the site back.

Currently I must clear content cache from the UI every other day to avoid site down. Any feedback would be much appreciated.

So, I install this plugin, then activate it so it makes a cache of all my dynamic pages. Now, let’s say I want to update my site pages, plugins, code, whatever… am I supposed to disable this plugin first so it resets everything to dynamic? Also, if I forget to disable the plugin before I update my site, will that mess up or damage my site? Please let me know. Thanks.

Following deletion of the plugin, I ahve received notification that a file remains and needfs to be deleted manually:

/home/cp[zzzzzz]/public_html/wp-content/advanced-cache.php

However I cannort see a file within the folder …public_html/wp-content/ – just more foldfers, no individual files. What is going on?

As the title says, is there any way to add a string to regected urls from a plugin?

I am building a plugin and I need specific urls to not be cached to served from the cache if a specific url query string is present. I would like to be able to do this without the need to have someone using the plugin add this string on this plugin’s advanced setting page.

Hello,
I have some question. I use Preload funtion but it create post page automatic and not create main page.

Preloading

Preloading is currently running.

posts 381: https://japanpowermall.com/MNS_Router/ms-router-placeholder-page-7724/
posts 380: https://japanpowermall.com/MNS_Router/ms-router-placeholder-page-7725/
posts 379: https://japanpowermall.com/MNS_Router/ms-router-placeholder-page-7726/
posts 378: https://japanpowermall.com/MNS_Router/ms-router-placeholder-page-7727/
posts 377: https://japanpowermall.com/MNS_Router/ms-router-placeholder-page-7728/


Thank you.

Hi

I used code in function.php to modify the price displayed on the front end, but when using currency switching, the page always remains in US dollars. When I turn off the wp super cache plugin, the currency on the page displays the correct currency symbol. I want to know how to make the wp super cache plugin bypass the cache of the currency switching plugin?

Hope to get help.

Thank you

Hi

I would like to know what plugin or theme is required as nothing is written in the mentioned FAQ refered too.

Kind regards

How can I exclude a page from being cached. Searching the forum, a plugin author said:

“First, you can define the constant DONOTCACHEPAGE within the code of those specific pages.” How is this done, exactly?

• This topic was modified 1 month, 2 weeks ago by jamminjames.
• This topic was modified 1 month, 2 weeks ago by jamminjames.

Hi there,

Love the plugin. I am using Cache Timeout: 86400 seconds with timer: 2400 seconds. When I use https://requestmetrics.com/resources/tools/http-cache-checker/ to confirm the cache, it shows only 10 minutes. I am not sure how to confirm whether the set values are being used.

Do I need to enable Cache delivery method = ?Expert for these settings to override the defaults?

Thanks

Anyone else getting this PHP warning?

PHP Warning: Attempt to read property “ID” on int in /wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 3411′

Hi,

When wordpress is trying to request es6-promise.auto.min.js.gzip it add a double slash in this path:
/wp-content/themes/Divi/common//scripts/es6-promise.auto.min.js.gzip?ver=4.2.2 and that’s why it fails. If I try to request with one slash it works. This file is cached on CDN.

Thanks!

• This topic was modified 1 month, 3 weeks ago by arnaukokoro.

When I log in and view the home page, the Testimonial carousel works fine. However, when I view it without logging in, it doesn’t function properly. Could you check why this is happening? Additionally, I’ve noticed that when I check the console, there are some extra div elements in the Testimonial carousel when logged in, but it appears normal when not logged in. Moreover, I’ve observed that an error appears in the console when I access the page without logging in.

Uncaught TypeError: $j(…).select2 is not a function
at initSelect2 (woocommerce.min.js:1:108)
at HTMLDocument. (woocommerce.min.js:1:7710)
at e (jquery.min.js:2:27028)
at t (jquery.min.js:2:27330)

I have 3 domains that share the same files and single database. So when a page/post cache happens, all HTML URLs are cached with the URL from which the request is coming from.

But if another user access for example the 2nd domain URL, then the cached page will work incorrectly, because the page source contains all URLS from the other domain. I hope this makes sense ??

Is there a way to intercept the cached static files (using a filter) generated by WP Super Cache, right before they are served to visitors, so I can replace the domain dynamically based on the actual request?

I looked in the plugin files for hooks, tried several, could not get anything to work.

Thanks for your help.

Is there a way to Preload all pages after the Cache is Successfully emptied?

• This topic was modified 2 months ago by alikleit.

I need to not cache pages if there is a specific query parameter in the URL. I did a search and I found a similar topic that mentions

“WP Super Cache settings—particularly the section on rejecting or accepting URLs with query parameters.”

I cannot find any settings for this in the settings. What am I missing?

Hello experts. I am getting the error message “500 (Internal Server Error)” on pages 1 and 2 0f my website. Have you got any advice please?

Thanks

Andy

Hi!

I am using this menu cart plugin https://www.ads-software.com/plugins/woocommerce-menu-bar-cart/

But no matter what i do, the Cart quantity is cached or broken.

How i test:

Open Incognito browser, add some items to cart, browse a little and then close all incognitos.

Open a new open Incognito window , browse a little and the cart count shows 1 or 2. I click it and cart is empty.

I tested with and without lateinit, standard and expert.

Don’t know what to exclude or get around that

thanks

/J

Hi WP Super Cache Folks,
I have three test sites with WP Super Cache Version 1.12.4?installed on them — a local test site spun up using Local by Flywheel; a local MAMP site; and a site hosted on Microsoft Azure. On the Local by Flywheel site, all pages are caching without issue. However, on the latter two sites, only the home page is being cached. I verified this by going into the wp-content/cache/supercache/ directory of each site and confirming the “Dynamic page generated” message on the respective page source. I also confirmed there are no settings differences with respect to the three sites as far as WP Super Cache is concerned, but I did notice that debug mode only works on the Local by Flywheel site.
My questions for you are:
1) Do you know of any site settings/configurations that could cause only the the home page (and no other pages) to cache properly?
2) Could the above also affect the debug mode?
Please note that on the Local by Flywheel site and the local MAMP site, the Cache Tester is passing. On the Microsoft Azure-hosted site, the Cache Tester renders, “Errors: : cURL error 60: SSL certificate problem: unable to get local issuer certificate”.
I’d appreciate any feedback/troubleshooting tips you may have about why the local MAMP site or Microsoft Azure-hosted site only cache the home page.
Best regards,
Matthew Huntley