51Degrees 4.5.9

Does 51Degrees work with WordPress 6.9.4 and PHP 8.1.12? A smoke test was performed on .

Summary

Errors
4PHP deprecation warnings
No JavaScript exceptions
All test pages loaded successfully
No resource errors
Performance

Memory usage: 128.91 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 version6.9.4
PHP version8.1.12
MySQL version10.6.10
PHP memory limit512M
Plugin Info
Last updated
Active installs 20+
WordPress.org page https://wordpress.org/plugins/51degrees-optimize-by-device-location/
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Pages 8

Plugins ‹ Test site — WordPress

Page screenshot: Plugins ‹ Test site — WordPress
URL /wp-admin/plugins.php?plugin_status=all&paged=1&s
Requested URL /wp-admin/plugins.php?action=activate&plugin=51degrees-optimize-by-device-location%2Ffiftyonedegrees.php&plugin_status=all&paged=1&s&_wpnonce=69672d2c00
Aspect after-activation
HTTP status 200
Load time 0.393 s
Memory usage 3.85 MiB
JS errors None
Resource errors None

Settings → 51Degrees

Page screenshot: Settings → 51Degrees
URL /wp-admin/options-general.php?page=51Degrees
Aspect menu-item
HTTP status 200
Load time 0.267 s
Memory usage 3.84 MiB
JS errors None
Resource errors None

Settings → 51Degrees → Google Analytics

Page screenshot: Settings → 51Degrees → Google Analytics
URL /wp-admin/options-general.php?page=51Degrees&tab=google-analytics
Aspect menu-item-tab
HTTP status 200
Load time 0.250 s
Memory usage 3.81 MiB
JS errors None
Resource errors None

Settings → 51Degrees → Properties

Page screenshot: Settings → 51Degrees → Properties
URL /wp-admin/options-general.php?page=51Degrees&tab=properties
Aspect menu-item-tab
HTTP status 200
Load time 0.261 s
Memory usage 3.81 MiB
JS errors None
Resource errors None

Settings → 51Degrees → Robots.txt

Page screenshot: Settings → 51Degrees → Robots.txt
URL /wp-admin/options-general.php?page=51Degrees&tab=robots
Aspect menu-item-tab
HTTP status 200
Load time 0.575 s
Memory usage 3.84 MiB
JS errors None
Resource errors None

Settings → 51Degrees → Suspicious

Page screenshot: Settings → 51Degrees → Suspicious
URL /wp-admin/options-general.php?page=51Degrees&tab=suspicious
Aspect menu-item-tab
HTTP status 200
Load time 0.260 s
Memory usage 3.82 MiB
JS errors None
Resource errors None

Settings → 51Degrees → Help

Page screenshot: Settings → 51Degrees → Help
URL /wp-admin/options-general.php?page=51Degrees&tab=help
Aspect menu-item-tab
HTTP status 200
Load time 1.529 s
Memory usage 3.81 MiB
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 0.233 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.php0.505 s0.449 s-0.056 s3.78 MiB3.91 MiB+ 136.23 KiB
/wp-admin/edit.php0.359 s0.300 s-0.059 s3.78 MiB3.96 MiB+ 180.65 KiB
/wp-admin/post-new.php0.824 s1.236 s+0.412 s6.31 MiB6.53 MiB+ 233.67 KiB
/wp-admin/upload.php0.626 s0.472 s-0.154 s3.74 MiB3.84 MiB+ 98.91 KiB
/wp-admin/options-writing.php0.317 s0.320 s+0.003 s3.71 MiB3.81 MiB+ 102.91 KiB
/wp-admin/media-new.php0.500 s0.299 s-0.201 s3.7 MiB3.81 MiB+ 111.1 KiB
/wp-admin/edit-tags.php?taxonomy=category0.323 s0.299 s-0.024 s3.72 MiB3.83 MiB+ 121.46 KiB
/wp-admin/post-new.php?post_type=page0.793 s0.815 s+0.022 s6.3 MiB6.46 MiB+ 167.63 KiB
/wp-admin/options-discussion.php0.467 s0.375 s-0.092 s3.71 MiB3.81 MiB+ 99.09 KiB
/wp-admin/edit-comments.php0.308 s0.438 s+0.130 s3.73 MiB3.85 MiB+ 118.91 KiB
/0.383 s0.185 s-0.198 s4.11 MiB4.15 MiB+ 47.43 KiB
Average 0.491 s0.472 s-0.020 s4.24 MiB4.36 MiB+ 128.91 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
Language % Lines of code Comment lines Files
PHP91.2%3,5231,13623
JavaScript4.6%177593
YAML1.8%70533
JSON1.3%5203
CSS1.1%4111
Total 3,863 1,249 33

PHP Code Analysis | More results »

Lines of code 2,915
Total complexity 568
Median class complexity 24.0
Median method complexity 3.0
Most complex class FiftyoneService
Most complex function FiftyOneDegreesRobotsTxt::enforce_crawler_redirect()
Classes 15
Methods 132
Functions 5

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 15

PHP Error Log 4 lines

[08-May-2026 00:08:42 UTC] PHP Deprecated:  stripos(): Passing null to parameter #1 ($haystack) of type string is deprecated in /wp-includes/functions.wp-scripts.php on line 133
[08-May-2026 00:08:44 UTC] PHP Deprecated:  stripos(): Passing null to parameter #1 ($haystack) of type string is deprecated in /wp-includes/functions.wp-scripts.php on line 133
[08-May-2026 00:08:48 UTC] PHP Deprecated:  stripos(): Passing null to parameter #1 ($haystack) of type string is deprecated in /wp-includes/functions.wp-scripts.php on line 133
[08-May-2026 00:08:51 UTC] PHP Deprecated:  stripos(): Passing null to parameter #1 ($haystack) of type string is deprecated in /wp-includes/functions.wp-scripts.php on line 133
See also: All tests for this plugin