73% wordpress-seo

Code Review | Yoast SEO

WordPress plugin Yoast SEO scored73%from 54 tests.

About plugin

  • Plugin page: wordpress-seo
  • Plugin version: 21.6
  • PHP compatiblity: 7.2.5+
  • PHP version: 7.4.16
  • WordPress compatibility: 6.2-6.4
  • WordPress version: 6.3.1
  • First release: Oct 11, 2010
  • Latest release: Nov 28, 2023
  • Number of updates: 1,653
  • Update frequency: every 3.3 days
  • Top authors: Yoast (59.23%)joostdevalk (23.65%)jipmoors (5.38%)atimmer (4.72%)DeFries (2.54%)

Code review

54 tests

User reviews

27608 reviews

Install metrics

5,000,000+ active /610,878,726 total downloads

Benchmarks

Plugin footprint 64% from 16 tests

Installer Passed 1 test

🔺 Critical test (weight: 50) | Checking the installer triggered no errors
Installer ran successfully

Server metrics [RAM: ▲9.58MB] [CPU: ▲71.51ms] 50% from 4 tests

Server-side resources used by Yoast SEO
Please take the time to fix the following items
  • RAM: The total memory usage must be kept under 10MB (currently 12.69MB on /wp-admin/admin.php?page=wpseo_installation_successful_free)
  • Extra RAM: Try to keep extra memory usage under 5MB (currently 9.58MB on /wp-admin/admin.php?page=wpseo_installation_successful_free)
Page Memory (MB) CPU Time (ms)
Home / 12.61 ▲9.14 107.90 ▲63.40
Dashboard /wp-admin 12.69 ▲9.38 116.38 ▲60.15
Posts /wp-admin/edit.php 13.75 ▲10.38 146.99 ▲90.94
Add New Post /wp-admin/post-new.php 17.78 ▲11.88 197.32 ▲97.44
Media Library /wp-admin/upload.php 12.64 ▲9.40 107.13 ▲71.55
Redirects /wp-admin/admin.php?page=wpseo_redirects 12.70 99.85
/wp-admin/admin.php?page=wpseo_configurator 12.08 81.13
Support /wp-admin/admin.php?page=wpseo_page_support 12.68 114.66
Integrations /wp-admin/admin.php?page=wpseo_integrations 12.70 102.98
Settings /wp-admin/admin.php?page=wpseo_page_settings 12.79 108.17
Premium /wp-admin/admin.php?page=wpseo_licenses 12.81 97.05
General /wp-admin/admin.php?page=wpseo_dashboard 13.10 115.41
Workouts /wp-admin/admin.php?page=wpseo_workouts 12.72 102.67
Academy /wp-admin/admin.php?page=wpseo_page_academy 12.70 100.06
/wp-admin/admin.php?page=wpseo_installation_successful_free 12.69 110.05

Server storage [IO: ▲12.93MB] [DB: ▲0.03MB] Passed 3 tests

Filesystem and database footprint
There were no storage issued detected upon installing this plugin
Filesystem: 1,286 new files
Database: 5 new tables, 10 new options
New tables
wp_yoast_indexable_hierarchy
wp_yoast_seo_links
wp_yoast_migrations
wp_yoast_primary_term
wp_yoast_indexable
New WordPress options
widget_recent-comments
widget_theysaidso_widget
wpseo
theysaidso_admin_options
can_compress_scripts
wpseo_social
wpseo_titles
yoast_migrations_free
db_upgraded
widget_recent-posts

Browser metrics Passed 4 tests

This is an overview of browser requirements for Yoast SEO
This plugin has a minimal impact on browser resources
Page Nodes Memory (MB) Script (ms) Layout (ms)
Home / 3,688 ▲926 18.45 ▲3.69 1.80 ▲0.06 27.64 ▼13.18
Dashboard /wp-admin 2,975 ▲795 9.32 ▲3.66 174.21 ▲81.01 110.66 ▲67.55
Posts /wp-admin/edit.php 2,606 ▲506 2.38 ▲0.38 43.98 ▲2.73 61.26 ▲24.30
Add New Post /wp-admin/post-new.php 2,422 ▲896 26.92 ▲3.84 1,015.40 ▲365.58 91.43 ▲39.65
Media Library /wp-admin/upload.php 1,690 ▲290 4.17 ▲0.03 95.34 ▼1.46 42.02 ▼0.74
Redirects /wp-admin/admin.php?page=wpseo_redirects 1,526 11.34 226.51 109.88
/wp-admin/admin.php?page=wpseo_configurator 2,232 16.13 255.88 105.06
Support /wp-admin/admin.php?page=wpseo_page_support 1,383 8.45 96.31 61.14
Integrations /wp-admin/admin.php?page=wpseo_integrations 1,899 13.59 183.26 135.59
Settings /wp-admin/admin.php?page=wpseo_page_settings 1,698 12.11 259.06 51.28
Premium /wp-admin/admin.php?page=wpseo_licenses 1,854 11.65 113.56 77.60
General /wp-admin/admin.php?page=wpseo_dashboard 2,230 16.02 198.38 79.60
Workouts /wp-admin/admin.php?page=wpseo_workouts 1,584 13.88 166.10 97.98
Academy /wp-admin/admin.php?page=wpseo_page_academy 1,502 10.04 110.77 36.31
/wp-admin/admin.php?page=wpseo_installation_successful_free 1,270 11.80 125.71 36.16

Uninstaller [IO: ▲0.00MB] [DB: ▲0.02MB] 50% from 4 tests

🔸 Tests weight: 35 | Checking the uninstaller removed all traces of the plugin
These items require your attention
  • Zombie tables detected upon uninstall: 5 tables
    • wp_yoast_seo_links
    • wp_yoast_migrations
    • wp_yoast_indexable_hierarchy
    • wp_yoast_primary_term
    • wp_yoast_indexable
  • The uninstall procedure has failed, leaving 10 options in the database
    • widget_theysaidso_widget
    • can_compress_scripts
    • widget_recent-comments
    • wpseo_titles
    • wpseo
    • wpseo_social
    • yoast_migrations_free
    • theysaidso_admin_options
    • widget_recent-posts
    • db_upgraded

Smoke tests 75% from 4 tests

Server-side errors Passed 1 test

🔹 Test weight: 20 | This is a short smoke test looking for server-side errors
The smoke test was a success, however most plugin functionality was not tested

SRP 50% from 2 tests

🔹 Tests weight: 20 | The single-responsibility principle applies for WordPress plugins as well - please make sure your PHP files perform no actions when accessed directly
Please fix the following items
  • 600× PHP files trigger errors when accessed directly with GET requests (only 10 are shown):
    • > PHP Fatal error
      Uncaught Error: Interface 'Yoast\\WP\\SEO\\Conditionals\\Conditional' not found in wp-content/plugins/wordpress-seo/src/conditionals/semrush-enabled-conditional.php:10
    • > PHP Fatal error
      Uncaught Error: Interface 'Yoast\\WP\\SEO\\Integrations\\Integration_Interface' not found in wp-content/plugins/wordpress-seo/src/integrations/watchers/indexable-permalink-watcher.php:18
    • > PHP Fatal error
      Uncaught Error: Class 'Yoast\\WP\\SEO\\Presentations\\Indexable_Presentation' not found in wp-content/plugins/wordpress-seo/src/presentations/indexable-post-type-archive-presentation.php:10
    • > PHP Fatal error
      Uncaught Error: Interface 'Yoast\\WP\\SEO\\Integrations\\Integration_Interface' not found in wp-content/plugins/wordpress-seo/src/integrations/front-end/robots-txt-integration.php:15
    • > PHP Fatal error
      Uncaught Error: Interface 'YoastSEO_Vendor\\Psr\\Http\\Message\\RequestInterface' not found in wp-content/plugins/wordpress-seo/vendor_prefixed/psr/http-message/src/ServerRequestInterface.php:43
    • > PHP Fatal error
      Uncaught Error: Class 'Yoast\\WP\\SEO\\Actions\\Importing\\Abstract_Aioseo_Importing_Action' not found in wp-content/plugins/wordpress-seo/src/actions/importing/deactivate-conflicting-plugins-action.php:18
    • > PHP Fatal error
      Uncaught Error: Interface 'Yoast\\WP\\SEO\\Conditionals\\Conditional' not found in wp-content/plugins/wordpress-seo/src/conditionals/admin/licenses-page-conditional.php:10
    • > PHP Fatal error
      Uncaught Error: Interface 'WPSEO_Metabox_Tab' not found in wp-content/plugins/wordpress-seo/admin/metabox/class-metabox-form-tab.php:11
    • > PHP Fatal error
      Uncaught Error: Interface 'WPSEO_Admin_Asset_Location' not found in wp-content/plugins/wordpress-seo/admin/class-admin-asset-dev-server-location.php:11
    • > PHP Fatal error
      Uncaught Error: Interface 'Yoast\\WP\\SEO\\Integrations\\Integration_Interface' not found in wp-content/plugins/wordpress-seo/src/integrations/front-end/crawl-cleanup-rss.php:12

User-side errors Passed 1 test

🔹 Test weight: 20 | This is a smoke test targeting browser errors/issues
Everything seems fine, but this is not an exhaustive test

Optimizations

Plugin configuration 90% from 29 tests

readme.txt 94% from 16 tests

It's important to format your readme.txt file correctly as it is parsed for the public listing of your plugin
These attributes need your attention: You can look at the official readme.txt

wordpress-seo/wp-seo.php 85% from 13 tests

"Yoast SEO" version 21.6's primary PHP file adds more information about the plugin and serves as the entry point for WordPress
Please take the time to fix the following:
  • Domain Path: The domain path points to an invalid folder, "/languages/" does not exist
  • Main file name: It is recommended to name the main PHP file as the plugin slug ("wordpress-seo.php" instead of "wp-seo.php")

Code Analysis 97% from 3 tests

File types Passed 1 test

🔸 Test weight: 35 | This is an overview of file extensions present in this plugin and a short test that no dangerous files are bundled with this plugin
Everything looks great! No dangerous files found in this plugin76,590 lines of code in 1,236 files:
Language Files Blank lines Comment lines Lines of code
PHP 1,034 16,655 57,945 71,830
JavaScript 89 204 544 4,240
SVG 51 0 1 246
XSLT 1 0 0 145
CSS 59 0 0 61
XML 1 0 0 44
Markdown 1 3 0 24

PHP code 50% from 2 tests

An overview of cyclomatic complexity and code structure
Please fix the following
  • Please reduce cyclomatic complexity of classes to less than 1000 (currently 2,655)
Cyclomatic complexity
Average complexity per logical line of code 0.46
Average class complexity 11.79
▷ Minimum class complexity 1.00
▷ Maximum class complexity 2,655.00
Average method complexity 2.78
▷ Minimum method complexity 1.00
▷ Maximum method complexity 86.00
Code structure
Namespaces 117
Interfaces 73
Traits 20
Classes 891
▷ Abstract classes 33 3.70%
▷ Concrete classes 858 96.30%
▷ Final classes 46 5.36%
Methods 6,131
▷ Static methods 663 10.81%
▷ Public methods 4,139 67.51%
▷ Protected methods 1,322 21.56%
▷ Private methods 670 10.93%
Functions 223
▷ Named functions 63 28.25%
▷ Anonymous functions 160 71.75%
Constants 397
▷ Global constants 15 3.78%
▷ Class constants 382 96.22%
▷ Public constants 371 97.12%

Plugin size Passed 2 tests

Image compression Passed 2 tests

Often times overlooked, PNG files can occupy unnecessary space in your plugin
38 compressed PNG files occupy 0.46MB
Potential savings
Compression of 5 random PNG files using pngquant
File Size - original Size - compressed Savings
images/twitter_card.png 15.76KB 17.79KB 0.00%
images/academy/wp_for_beginners.png 10.37KB 11.41KB 0.00%
images/indexnow.png 13.29KB 15.23KB 0.00%
images/support/support_forums.png 16.22KB 18.36KB 0.00%
images/academy/understanding_structured_data.png 4.13KB 4.63KB 0.00%