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W3 Total Cache 2.8.15

Does W3 Total Cache work with WordPress 6.9 and PHP 8.1.12? A smoke test was performed on 2025-12-03 17:31:16 UTC.

Summary

Pages 20

Plugins ‹ Test site — WordPress

Performance

Performance → Feature Showcase

Performance → General Settings

Performance → Page Cache

Performance → Minify

Performance → Database Cache

Performance → Object Cache

Performance → Browser Cache

Performance → Cache Groups

Performance → CDN

Performance → Support

Performance → Google PageSpeed

Performance → User Experience

Performance → Install

Performance → Setup Guide

Performance → About

Performance → Extensions

Performance → Statistics

Test site – Just another WordPress site

Benchmark

URL	Load time			Memory usage
	Inactive	Active	Change	Inactive	Active	Change
/wp-admin/index.php	0.422 s	0.509 s	+0.087 s	3.77 MiB	4.41 MiB	+ 651.59 KiB
/wp-admin/edit.php	0.350 s	0.304 s	-0.046 s	3.78 MiB	4.44 MiB	+ 680.39 KiB
/wp-admin/post-new.php	0.842 s	0.851 s	+0.009 s	6.3 MiB	6.97 MiB	+ 681.62 KiB
/wp-admin/upload.php	0.629 s	0.366 s	-0.263 s	3.74 MiB	4.36 MiB	+ 641.58 KiB
/wp-admin/options-writing.php	0.325 s	0.307 s	-0.018 s	3.71 MiB	4.25 MiB	+ 558.87 KiB
/wp-admin/media-new.php	0.483 s	0.389 s	-0.094 s	3.7 MiB	4.24 MiB	+ 557.23 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.456 s	0.353 s	-0.103 s	3.71 MiB	4.31 MiB	+ 608.49 KiB
/wp-admin/post-new.php?post_type=page	0.669 s	0.644 s	-0.025 s	6.29 MiB	6.97 MiB	+ 691.05 KiB
/wp-admin/options-discussion.php	0.318 s	0.331 s	+0.013 s	3.71 MiB	4.28 MiB	+ 580.45 KiB
/wp-admin/edit-comments.php	0.313 s	0.344 s	+0.031 s	3.73 MiB	4.33 MiB	+ 617.34 KiB
/	0.254 s	0.343 s	+0.089 s	4.1 MiB	4.3 MiB	+ 206.46 KiB
Average	0.460 s	0.431 s	-0.029 s	4.23 MiB	4.81 MiB	+ 588.64 KiB

Code Statistics

Note: Third-party libraries and minified JS/CSS files are excluded from these statistics where possible, so the numbers you see here may be lower than those reported by other tools.

Language		%	Lines of code	Comment lines	Files
	PHP	90.3%	113,154	52,264	632
	JavaScript	6.1%	7,614	1,060	40
	CSS	3.1%	3,945	92	19
	Java	0.2%	231	77	1
	Markdown	0.1%	147	0	4
	INI	0.1%	84	16	6
	SVG	0.1%	65	1	4
	XML	0.0%	57	4	1
	HTML	0.0%	7	0	1
Total			125,304	53,514	708

PHP Code Analysis | More results »

Additions

Things that the plugin adds to the site. This section is not intended to be comprehensive. The test tool only looks for a few specific types of added content.

Options wp_options 6

• w3tc_cached_notices
• w3tc_extensions_hooks
• w3tc_install_date
• w3tc_post_update_admin_tasks_ran_versions
• w3tc_post_update_generic_tasks_ran_versions
• w3tc_state

PHP Error Log 10 lines

[03-Dec-2025 17:31:34 UTC] W3 Total Cache environment exception: Edit file <strong>/wp-config.php</strong> and add next lines:<textarea style="height: 100px; width: 100%;">/** Enable W3 Total Cache */
define(&#039;WP_CACHE&#039;, true); // Added by W3 Total Cache
</textarea><br />
[03-Dec-2025 17:31:34 UTC] W3 Total Cache environment exception: Edit file <strong>/wp-config.php</strong> and add next lines:<textarea style="height: 100px; width: 100%;">/** Enable W3 Total Cache */
define(&#039;WP_CACHE&#039;, true); // Added by W3 Total Cache
</textarea><br />
[03-Dec-2025 17:31:57 UTC] PHP Deprecated:  Function WP_Dependencies-&gt;add_data() was called with an argument that is <strong>deprecated</strong> since version 6.9.0! IE conditional comments are ignored by all supported browsers. in /wp-includes/functions.php on line 6131
[03-Dec-2025 17:31:57 UTC] PHP Deprecated:  Function WP_Dependencies-&gt;add_data() was called with an argument that is <strong>deprecated</strong> since version 6.9.0! IE conditional comments are ignored by all supported browsers. in /wp-includes/functions.php on line 6131
[03-Dec-2025 17:32:06 UTC] PHP Deprecated:  Function WP_Dependencies-&gt;add_data() was called with an argument that is <strong>deprecated</strong> since version 6.9.0! IE conditional comments are ignored by all supported browsers. in /wp-includes/functions.php on line 6131
[03-Dec-2025 17:32:06 UTC] PHP Deprecated:  Function WP_Dependencies-&gt;add_data() was called with an argument that is <strong>deprecated</strong> since version 6.9.0! IE conditional comments are ignored by all supported browsers. in /wp-includes/functions.php on line 6131

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