Klaviyo 3.7.5
Does Klaviyo work with WordPress 7.0 and PHP 8.1.12? A smoke test was performed on .
Summary
Errors
| 6 | PHP deprecation warnings |
| No JavaScript exceptions | |
| All test pages loaded successfully | |
| No resource errors |
Performance
Memory usage: 50.56 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 version | 7.0 |
|---|---|
| PHP version | 8.1.12 |
| MySQL version | 10.6.10 |
| PHP memory limit | 512M |
Plugin Info
| Last updated | |
|---|---|
| Active installs | 100,000+ |
| WordPress.org page | https://wordpress.org/plugins/klaviyo/ |
| Badges |
|
Pages 5
Plugins ‹ Test site — WordPress
| URL | /wp-admin/plugins.php?plugin_status=all&paged=1&s |
|---|---|
| Requested URL | /wp-admin/plugins.php?action=activate&plugin=klaviyo%2Fklaviyo.php&plugin_status=all&paged=1&s&_wpnonce=d5d69514f8 |
| Aspect | after-activation |
| HTTP status | 200 |
| Load time | 0.942 s |
| Memory usage | 3.94 MiB |
| JS errors | None |
| Resource errors | None |
Klaviyo
| URL | /wp-admin/admin.php?page=klaviyo_settings |
|---|---|
| Aspect | menu-item |
| HTTP status | 200 |
| Load time | 0.504 s |
| Memory usage | 3.9 MiB |
| JS errors | None |
| Resource errors | None |
Klaviyo → Help
| URL | /wp-admin/admin.php?page=klaviyo_help |
|---|---|
| Aspect | menu-item |
| HTTP status | 200 |
| Load time | 0.443 s |
| Memory usage | 3.9 MiB |
| JS errors | None |
| Resource errors | None |
Test site – Just another WordPress site
| URL | / |
|---|---|
| Aspect | front-page |
| HTTP status | 200 |
| Load time | 0.201 s |
| Memory usage | 4.27 MiB |
| JS errors | None |
| Resource errors | None |
Widgets ‹ Test site — WordPress
| URL | /wp-admin/widgets.php |
|---|---|
| Aspect | new-sidebar-widgets |
| HTTP status | 200 |
| Load time | 1.519 s |
| Memory usage | 6.48 MiB |
| JS errors | None |
| Resource errors | None |
Benchmark
| URL | Load time | Memory usage | ||||
|---|---|---|---|---|---|---|
| Inactive | Active | Change | Inactive | Active | Change | |
| /wp-admin/index.php | 0.664 s | 0.733 s | +0.069 s | 3.92 MiB | 3.98 MiB | + 52.7 KiB |
| /wp-admin/edit.php | 0.513 s | 0.521 s | +0.008 s | 3.98 MiB | 4.03 MiB | + 52.39 KiB |
| /wp-admin/post-new.php | 2.009 s | 1.832 s | -0.177 s | 6.56 MiB | 6.64 MiB | + 87.45 KiB |
| /wp-admin/upload.php | 0.720 s | 0.695 s | -0.025 s | 3.89 MiB | 3.92 MiB | + 34.92 KiB |
| /wp-admin/options-writing.php | 0.527 s | 0.495 s | -0.032 s | 3.86 MiB | 3.9 MiB | + 38.91 KiB |
| /wp-admin/media-new.php | 0.584 s | 0.536 s | -0.048 s | 3.85 MiB | 3.9 MiB | + 47.11 KiB |
| /wp-admin/edit-tags.php?taxonomy=category | 0.594 s | 0.912 s | +0.318 s | 3.86 MiB | 3.91 MiB | + 52.28 KiB |
| /wp-admin/post-new.php?post_type=page | 1.719 s | 1.350 s | -0.369 s | 6.55 MiB | 6.63 MiB | + 79.72 KiB |
| /wp-admin/options-discussion.php | 0.564 s | 0.536 s | -0.028 s | 3.86 MiB | 3.9 MiB | + 35.41 KiB |
| /wp-admin/edit-comments.php | 0.527 s | 0.870 s | +0.343 s | 3.88 MiB | 3.92 MiB | + 34.92 KiB |
| / | 0.301 s | 0.230 s | -0.071 s | 4.23 MiB | 4.27 MiB | + 40.29 KiB |
| Average | 0.793 s | 0.792 s | -0.001 s | 4.4 MiB | 4.45 MiB | + 50.56 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 | 83.3% | 2,193 | 1,382 | 24 | |
| JavaScript | 9.3% | 245 | 82 | 6 | |
| CSS | 5.7% | 150 | 19 | 1 | |
| JSON | 1.3% | 34 | 0 | 1 | |
| SVG | 0.4% | 11 | 0 | 4 | |
| Total | 2,633 | 1,483 | 36 | ||
PHP Code Analysis | More results »
| Lines of code | 2,108 |
|---|---|
| Total complexity | 358 |
| Median class complexity | 12.0 |
| Median method complexity | 1.0 |
| Most complex class | WPKlaviyoAdmin |
| Most complex function | wck_build_cart_data() |
| Classes | 14 |
|---|---|
| Methods | 99 |
| Functions | 39 |
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
- klaviyo_activation_time
- widget_klaviyo_emailsignup_widget
- widget_klaviyo_embedemailsignup_widget
- woocommerce_klaviyo_version
Sidebar Widgets 2
| ID | Name |
|---|---|
| klaviyo_emailsignup_widget | Klaviyo: Legacy Email Sign Up |
| klaviyo_embedemailsignup_widget | Klaviyo: Email Sign Up |
PHP Error Log 6 lines
[20-May-2026 22:51:06 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /wp-content/plugins/klaviyo/includes/class-wck-options.php on line 79
[20-May-2026 22:51:06 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /wp-content/plugins/klaviyo/includes/class-wck-options.php on line 79
[20-May-2026 22:51:06 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /wp-content/plugins/klaviyo/includes/class-wck-options.php on line 79
[20-May-2026 22:51:06 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /wp-content/plugins/klaviyo/includes/class-wck-options.php on line 79
[20-May-2026 22:51:06 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /wp-content/plugins/klaviyo/includes/class-wck-options.php on line 79
[20-May-2026 22:51:06 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /wp-content/plugins/klaviyo/includes/class-wck-options.php on line 79