Marko Vasiljevic

Hello Michael,

Thank you for reaching out and for bringing this to our attention.

I’ve checked this with the team, and this will be fixed in the upcoming W3 Total Cache release.

Thank you for your patience!

Hello Thymo,

Thank you for reaching out and I am happy to help!
For Page Fragment Caching in the W3 Total Cache, the comment/code blocks should be added to your theme template files as HTML and not within the PHP open () tags, as it will cause a PHP parse error/syntax error. Do not include any sensitive information in your code fragments; the code can be revealed if W3 Total Cache is deactivated, the Page Cache is changed to use an incompatible storage engine, or the defined W3TC_DYNAMIC_SECURITY string value is changed or not defined.

Page Fragment Cache cannot be used in combination with Page Cache mode Disk: Enhanced because that mode will load the cached page directly from Apache or Nginx. We recommend using Disk: Basic, which will run PHP to process the requests with the benefit of speeding up responses by loading a cached page instead of building the page from scratch. You can use Page Cache engines Redis or Memcached on dedicated or VPS servers as well.

This being said, can you please confirm that the comment is outside of php tags and which caching method is used?

Thanks!

Hello Natascha,

Thank you for reaching out, and I am happy to help!
Can you please share more information about how the website stops working and what happens in the front end?
How did you determine that the W3 Total Cache is responsible for the issue you are having?

Can you please disable the settings one by one in Performance>general settings, save the settings and purge the cache after each setting is disabled, and see which one might be causing the issue?

Thanks!

Hello Rumyana,

Thank you for reaching out, and I am happy to help!
As I can see, the W3 Total Cache Pro license key is applied to your website.
If you still do not see the Pro version active, remove the license key from Performance>General settings, Licensing sub-box, license field, and save all settings. Re-enter the license and save all settings.

W3 Total Cache Pro should be active after these steps!

Let me know if this helps!

Thanks!

Hello Adel,

Thank you for reaching out, and I am happy to help!

Just to confirm, you wish to switch the W3 Total Cache Pro to another domain?
Can you please reach out to us directly using this contact form and provide the information about your subscription so we can avoid sharing sensitive data on a public forum, and we can do this for you?
Thanks!

Hello Brad,

Thank you for reaching out, and I am happy to help!
When the Object Cache is enabled in the W3 Total Cache, W3TC adds a drop-in file object-cache.php in the /wp-content/ folder
If you are using any other form of Object Caching by any other plugin, it may also add the drop-in file with the same name to utilize persistent Object Caching.
You can manually check the mentioned file and see if it’s added by the W3TC or any other plugin by opening the file directly in the cPanel or via any text editor.

Please make sure to check with WPMUDEV.com if they are adding the drop-in file, in which case, you should disable the W3TC Object Caching, and if you want to use the Object Caching in the W3 Total Cache, make sure to disable the other one.

Thanks!

Hello,

Can you please double-check your email?
I’ve re-sent the reply again.

Please let me know if you are receiving the replies

Thanks!

Hello Simon,

Thank you for reaching out, and I am happy to help!
What you share in the screenshot is the Google Page Speed tool section in the W3 Total Cache General settings. There, you can only authorize the Google Page Speed tool

To actually run the Google Page Speed within the W3 Total Cache, go to the left side admin section and select Performance> Google Page Speed as shown in the screenshot below:

There, you can run the tests, which will also reflect in the Dashboard widget

Can you please share what you are seeing in the dashboard?

Thanks!

Hello,

Thank you for reaching out, and I am happy to help!
This depends on how big the website is, so if the website has a huge theme or a lot of plugins, it’s quite possible that the memory limit was reached.
Also, which module are you using Redis as a caching method for in W3 Total Cache?
It’s also possible that the Redis memory is bloated, so you should also check this
Check Redis memory usage

redis-cli info memory
redis-cli info stats

See if your Redis instance is bloated.

Sometimes, memory is genuinely too low for your site’s workload. If after cleaning up the cache usage, you still hit the limit, raising to 768M or 1G is fine:

memory_limit = 1G

in php.ini or

I hope this helps!

Thanks!

Hello Amaranta

Thank you for reaching out, and I am happy to help!

Can you please reach out to us via the W3 Total Cache plugin in Performance>Support>Billing, or via this contact form so we can avoid sharing any sensitive information in a public forum?

Awaiting your email

Thanks!

Hello Elias,

Thank you for contacting W3 Total Cache support.

Unfortunately, due to the 5 failed collection attempts since Sep 10, 2025 5:08 AM EDT the subscription is now terminated and the license is canceled. We cannot re-enable the terminated subscription for security reasons.
Most likely the card is expired and you should have updated the billing info

Please purchase a new W3 Total Cache Pro license and replace the old one in Performance>General settings>Licensing, to be able to continue using the Pro version.
You can use this link to purchase at a 50% discount

Thanks!

Hello,

Thank you for reaching out, and I am happy to help!
Can you please update the W3 Total Cache in wp-content/plugins/w3-total-cache/Generic_Plugin.php
And replace line 603 with:

if ( is_array( $strings ) && count( $strings ) ) {

Please let me know if this helps!

Thanks!

Hello Max,

I’ve replied to your email on Aug 27th, asking for the details about the subscription and some clarification
I’ve just re-sent the email.
Please check your email and let me know if you received it.

Thanks!

Hello Ralph,

Thank you for reaching out, and I am happy to help!
I’ve sent you an email via the W3 Total Cache support channel.
Please check your email so we don’t share any sensitive information in the public support forum

Thanks!

Hello Maximilian,

Thank you for reaching out, and I am happy to help!
We’ve received all your emails and replied to all of them, and provided all answers via the W3 Total Cache support channel.
Please check your email and continue any correspondence there so we can avoid duplicating the answers

Thanks!

Hello Tamta,

Thank you for reaching out, and I am happy to help!
Since this is a public forum and no sensitive information should be shared here, I’ve sent you an email via the W3 Total Cache support channel and provided the requested information.
The email I sent the information to is the CloudLinux email you provided here.
Please check your email and let me know if there is anything else I can assist you with

Thanks!

Hello Eva,

Thank you for your feedback.
So the files are in wp-content/cache/object/ folder.
If the W3 Total Cache is disabled and you may have Object Caching enabled in the W3TC settings, and if the caching method was set to Disk, those files may be cached in that folder.
As I’ve mentioned before, it’s not recommended to use Object Caching if the only option for caching is Disk.
Please make sure to delete the entire /cache/ folder. Wait for one day and see if the folder is created again.
Please check if you have any other plugins that may be doing the Object Caching or any other form of caching
Check the wp-content folder for the object-cache.php file and check if that file is a W3TC drop-in.

I hope this helps!

Thanks!

Hello Eva,

Thank you for your feedback.
If the W3TC is disabled, it will not create any files. You can safely delete the cache folder manually, and please check if you are using any other plugin for caching like SG optimizer

With the W3TC files should be cached in /cache/page_enhanced/yourwebsite.com/ folder
Are those files there?

Thanks!

Hello Mark,

Thank you for reaching out, and I am happy to help!
Regarding your question, I can see that you opened a topic on wp.org in the W3 Total Cache support forum.
Please continue the correspondence there so we can avoid going back and forth in different forums

Thanks!

Hello Amber,

Thank you for your feedback.
We are working on a fix for this, and it will be available in the next patch release.
Please keep process background images disabled until the patch is out.

Thanks!