Klaviyo 3.8.0
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: 49.81 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=c51ea94dee |
| Aspect | after-activation |
| HTTP status | 200 |
| Load time | 0.609 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 | 0.495 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 | 0.662 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 | 0.232 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 | 1.813 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 | 0.758 s | 0.699 s | -0.059 s | 3.92 MiB | 3.98 MiB | + 51.77 KiB |
| /wp-admin/edit.php | 0.582 s | 0.510 s | -0.072 s | 3.98 MiB | 4.03 MiB | + 51.46 KiB |
| /wp-admin/post-new.php | 2.114 s | 1.758 s | -0.356 s | 6.56 MiB | 6.64 MiB | + 86.53 KiB |
| /wp-admin/upload.php | 0.728 s | 0.986 s | +0.258 s | 3.89 MiB | 3.92 MiB | + 33.99 KiB |
| /wp-admin/options-writing.php | 0.545 s | 0.589 s | +0.044 s | 3.86 MiB | 3.9 MiB | + 37.98 KiB |
| /wp-admin/media-new.php | 0.973 s | 0.575 s | -0.398 s | 3.85 MiB | 3.9 MiB | + 46.18 KiB |
| /wp-admin/edit-tags.php?taxonomy=category | 0.524 s | 0.831 s | +0.307 s | 3.86 MiB | 3.91 MiB | + 51.35 KiB |
| /wp-admin/post-new.php?post_type=page | 1.465 s | 1.557 s | +0.092 s | 6.55 MiB | 6.63 MiB | + 78.79 KiB |
| /wp-admin/options-discussion.php | 0.565 s | 0.879 s | +0.314 s | 3.86 MiB | 3.9 MiB | + 34.48 KiB |
| /wp-admin/edit-comments.php | 0.527 s | 0.508 s | -0.019 s | 3.88 MiB | 3.92 MiB | + 33.99 KiB |
| / | 0.297 s | 0.234 s | -0.063 s | 4.23 MiB | 4.27 MiB | + 41.35 KiB |
| Average | 0.825 s | 0.830 s | +0.004 s | 4.41 MiB | 4.45 MiB | + 49.81 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 | 83.5% | 2,234 | 1,468 | 25 | |
| JavaScript | 9.2% | 245 | 82 | 6 | |
| CSS | 5.6% | 150 | 19 | 1 | |
| JSON | 1.3% | 34 | 0 | 1 | |
| SVG | 0.4% | 11 | 0 | 4 | |
| Total | 2,674 | 1,569 | 37 | ||
PHP Code Analysis | More results »
| Lines of code | 2,148 |
|---|---|
| Total complexity | 368 |
| 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 | 42 |
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
[29-May-2026 15:40:24 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /wp-content/plugins/klaviyo/includes/class-wck-options.php on line 79
[29-May-2026 15:40:24 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /wp-content/plugins/klaviyo/includes/class-wck-options.php on line 79
[29-May-2026 15:40:24 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /wp-content/plugins/klaviyo/includes/class-wck-options.php on line 79
[29-May-2026 15:40:24 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /wp-content/plugins/klaviyo/includes/class-wck-options.php on line 79
[29-May-2026 15:40:24 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /wp-content/plugins/klaviyo/includes/class-wck-options.php on line 79
[29-May-2026 15:40:24 UTC] PHP Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /wp-content/plugins/klaviyo/includes/class-wck-options.php on line 79