1. Home
2. MC4WP: Mailchimp for WordPress
3. 4.10.9

MC4WP: Mailchimp for WordPress 4.10.9

Does MC4WP: Mailchimp for WordPress work with WordPress 6.9 and PHP 8.1.12? A smoke test was performed on 2025-12-02 21:00:21 UTC.

Summary

Pages 8

Plugins ‹ Test site — WordPress

MC4WP

MC4WP → Form

MC4WP → Integrations

MC4WP → Other

MC4WP → Add-ons

Test site – Just another WordPress site

Widgets ‹ Test site — WordPress

Benchmark

URL	Load time			Memory usage
	Inactive	Active	Change	Inactive	Active	Change
/wp-admin/index.php	0.506 s	0.407 s	-0.099 s	3.78 MiB	4 MiB	+ 225.62 KiB
/wp-admin/edit.php	0.350 s	0.296 s	-0.054 s	3.78 MiB	4.05 MiB	+ 271.56 KiB
/wp-admin/post-new.php	0.848 s	0.886 s	+0.038 s	6.31 MiB	6.6 MiB	+ 302.83 KiB
/wp-admin/upload.php	0.661 s	0.565 s	-0.096 s	3.74 MiB	3.94 MiB	+ 207.51 KiB
/wp-admin/options-writing.php	0.334 s	0.322 s	-0.012 s	3.71 MiB	3.9 MiB	+ 191.18 KiB
/wp-admin/media-new.php	0.503 s	0.255 s	-0.248 s	3.7 MiB	3.9 MiB	+ 199.38 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.463 s	0.304 s	-0.159 s	3.72 MiB	3.92 MiB	+ 210.05 KiB
/wp-admin/post-new.php?post_type=page	0.678 s	0.647 s	-0.031 s	6.3 MiB	6.52 MiB	+ 231.3 KiB
/wp-admin/options-discussion.php	0.320 s	0.463 s	+0.143 s	3.71 MiB	3.9 MiB	+ 187.69 KiB
/wp-admin/edit-comments.php	0.320 s	0.322 s	+0.002 s	3.73 MiB	3.92 MiB	+ 187.19 KiB
/	0.280 s	0.184 s	-0.096 s	4.12 MiB	4.21 MiB	+ 99.59 KiB
Average	0.478 s	0.423 s	-0.056 s	4.24 MiB	4.44 MiB	+ 210.36 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	88.6%	9,123	5,054	126
	Markdown	10.4%	1,068	0	3
	XML	0.4%	45	0	1
	JavaScript	0.3%	31	0	8
	SVG	0.2%	21	0	3
	CSS	0.0%	4	0	4
Total			10,292	5,054	145

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 4

• mc4wp
• mc4wp_flash_messages
• mc4wp_version
• widget_mc4wp_form_widget

Custom Post Types 1

ID	Name
mc4wp-form	Mailchimp Sign-up Forms

Sidebar Widgets 1

ID	Name
mc4wp_form_widget	Mailchimp Sign-Up Form

PHP Error Log 6 lines

[02-Dec-2025 21:00:46 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
[02-Dec-2025 21:00:46 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
[02-Dec-2025 21:00:55 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
[02-Dec-2025 21:00:55 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
[02-Dec-2025 21:00:55 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
[02-Dec-2025 21:00:55 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

---