Contact Form 7 Extension For Mailchimp 0.9.36

Does "Contact Form 7 Extension For Mailchimp" work with WordPress 6.9 and PHP 8.1.12? A smoke test was performed on .

Summary

Errors
4PHP deprecation warnings
No JavaScript exceptions
1Page failed to load
  • 1 403 Forbidden
No resource errors
Performance

Memory usage: 63.86 KiB
The average PHP memory usage increased by this amount after activating by the plugin.

Page speed impact: insignificant.
The plugin didn't make the site noticeably slower.

Environment
WordPress version6.9
PHP version8.1.12
MySQL version10.6.10
PHP memory limit512M
Plugin Info
Last updated
Active installs 50,000+
WordPress.org page https://wordpress.org/plugins/contact-form-7-mailchimp-extension/
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Pages 2

WordPress › Error

Page screenshot: WordPress › Error
URL /wp-admin/admin.php?page=wpcf7&post=&active-tab=chimpmatic-lite-panel
Requested URL /wp-admin/plugins.php?action=activate&plugin=contact-form-7-mailchimp-extension%2Fchimpmatic-lite.php&plugin_status=all&paged=1&s&_wpnonce=ca6d37be76
Aspect after-activation
HTTP status 403
Load time 0.494 s
Memory usage N/A
JS errors None
Resource errors None

Test site – Just another WordPress site

Page screenshot: Test site – Just another WordPress site
URL /
Aspect front-page
HTTP status 200
Load time 0.179 s
Memory usage 4.15 MiB
JS errors None
Resource errors None

Benchmark

URL Load time Memory usage
Inactive Active Change Inactive Active Change
/wp-admin/index.php0.415 s0.336 s-0.079 s3.77 MiB3.79 MiB+ 15.78 KiB
/wp-admin/edit.php0.370 s0.297 s-0.073 s3.78 MiB3.83 MiB+ 49.19 KiB
/wp-admin/post-new.php0.845 s0.715 s-0.130 s6.3 MiB6.48 MiB+ 180.94 KiB
/wp-admin/upload.php0.639 s0.472 s-0.167 s3.74 MiB3.77 MiB+ 31.78 KiB
/wp-admin/options-writing.php0.328 s0.297 s-0.031 s3.71 MiB3.74 MiB+ 35.77 KiB
/wp-admin/media-new.php0.506 s0.345 s-0.161 s3.7 MiB3.74 MiB+ 43.97 KiB
/wp-admin/edit-tags.php?taxonomy=category0.330 s0.281 s-0.049 s3.71 MiB3.77 MiB+ 54.64 KiB
/wp-admin/post-new.php?post_type=page0.743 s0.652 s-0.091 s6.29 MiB6.46 MiB+ 174.42 KiB
/wp-admin/options-discussion.php0.338 s0.398 s+0.060 s3.71 MiB3.74 MiB+ 32.27 KiB
/wp-admin/edit-comments.php0.317 s0.326 s+0.009 s3.73 MiB3.76 MiB+ 31.77 KiB
/0.264 s0.186 s-0.078 s4.1 MiB4.15 MiB+ 51.91 KiB
Average 0.463 s0.391 s-0.072 s4.23 MiB4.29 MiB+ 63.86 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.

PHP
JavaScript
CSS
Language % Lines of code Comment lines Files
PHP53.5%4,0901,64425
JavaScript30.2%2,3084376
CSS14.8%1,1331172
Markdown1.5%11301
SVG0.0%101
Total 7,645 2,198 35

PHP Code Analysis | More results »

Lines of code 3,787
Total complexity 736
Median class complexity 17.0
Median method complexity 2.0
Most complex class ClickSyncr\Metrics\Core\Collector
Most complex function cmatic_subscribe_submission()
Classes 11
Methods 98
Functions 73

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 1

PHP Error Log 4 lines

[03-Dec-2025 02:48:33 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 02:48:33 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 02:48:42 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 02:48:42 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
See also: All tests for this plugin