404 Solution 3.0.6

Does 404 Solution work with WordPress 6.8.3 and PHP 8.1.12? A smoke test was performed on .

Summary

Errors
2Database errors
No JavaScript exceptions
All test pages loaded successfully
No resource errors
Performance

Memory usage: 72.28 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 version6.8.3
PHP version8.1.12
MySQL version10.6.10
PHP memory limit512M
Plugin Info
Last updated
Active installs 10,000+
WordPress.org page https://wordpress.org/plugins/404-solution/
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Pages 3

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=404-solution%2F404-solution.php&plugin_status=all&paged=1&s&_wpnonce=1daa2afc19
Aspect after-activation
HTTP status 200
Load time 2.210 s
Memory usage 3.73 MiB
JS errors None
Resource errors None

Settings → 404 Solution

Page screenshot: Settings → 404 Solution
URL /wp-admin/options-general.php?page=abj404_solution
Aspect menu-item
HTTP status 200
Load time 0.402 s
Memory usage 3.73 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 0.217 s
Memory usage 3.47 MiB
JS errors None
Resource errors None

Benchmark

URL Load time Memory usage
Inactive Active Change Inactive Active Change
/wp-admin/index.php0.310 s0.300 s-0.010 s3.51 MiB3.58 MiB+ 73.02 KiB
/wp-admin/edit.php0.206 s0.211 s+0.005 s3.57 MiB3.66 MiB+ 93.01 KiB
/wp-admin/post-new.php0.791 s0.626 s-0.165 s6.06 MiB6.2 MiB+ 142.24 KiB
/wp-admin/upload.php0.552 s0.323 s-0.229 s3.52 MiB3.58 MiB+ 55.75 KiB
/wp-admin/options-writing.php0.198 s0.335 s+0.137 s3.5 MiB3.56 MiB+ 59.77 KiB
/wp-admin/media-new.php0.262 s0.272 s+0.010 s3.49 MiB3.56 MiB+ 67.94 KiB
/wp-admin/edit-tags.php?taxonomy=category0.267 s0.188 s-0.079 s3.5 MiB3.58 MiB+ 78.89 KiB
/wp-admin/post-new.php?post_type=page0.614 s0.571 s-0.043 s6.05 MiB6.19 MiB+ 138.35 KiB
/wp-admin/options-discussion.php0.314 s0.409 s+0.095 s3.5 MiB3.56 MiB+ 56.27 KiB
/wp-admin/edit-comments.php0.192 s0.208 s+0.016 s3.52 MiB3.58 MiB+ 55.77 KiB
/0.301 s0.192 s-0.109 s3.5 MiB3.47 MiB- 25.96 KiB
Average 0.364 s0.330 s-0.034 s3.98 MiB4.05 MiB+ 72.28 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.

PO File
PHP
CSS
Language % Lines of code Comment lines Files
PO File42.6%15,72875112
PHP36.2%13,3894,08236
CSS8.2%3,0172882
JavaScript4.1%1,50344514
Markdown3.9%1,44602
HTML3.5%1,2763840
SQL1.5%54212535
JSON0.1%4501
Total 36,946 5,729 142

PHP Code Analysis | More results »

Lines of code 13,404
Total complexity 2,836
Median class complexity 32.0
Median method complexity 3.0
Most complex class ABJ_404_Solution_PluginLogic
Most complex function ABJ_404_Solution_SpellChecker::getLikelyMatchIDs()
Classes 33
Methods 531
Functions 15

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.

Database Tables 6

Options wp_options 3

PHP Error Log 16 lines

[27-Nov-2025 17:50:23 UTC] WordPress database error Table 'wordpress.wp_abj404_lookup' doesn't exist for query 
/* ------------------ /wp-content/plugins/404-solution/includes/sql/correctLookupTableIssue.sql BEGIN ----- */ 

delete from wp_abj404_lookup
where lkup_value in (
    select lkup_value from (
	    SELECT DISTINCT lkup_value
	    FROM wp_abj404_lookup
	    group by lkup_value
	    having count(lkup_value) > 1
    ) a
)

/* ------------------ /wp-content/plugins/404-solution/includes/sql/correctLookupTableIssue.sql END ----- */ 
 made by activate_plugin, plugin_sandbox_scrape, include_once('/plugins/404-solution/404-solution.php'), require_once('/plugins/404-solution/includes/Loader.php'), ABJ_404_Solution_SpellChecker::init, ABJ_404_Solution_SpellChecker::getInstance, ABJ_404_Solution_SpellChecker->__construct, ABJ_404_Solution_PluginLogic->getOptions, ABJ_404_Solution_PluginLogic->updateToNewVersion, ABJ_404_Solution_PluginLogic->updateToNewVersionAction, ABJ_404_Solution_DatabaseUpgradesEtc->createDatabaseTables, ABJ_404_Solution_DatabaseUpgradesEtc->reallyCreateDatabaseTables, ABJ_404_Solution_DatabaseUpgradesEtc->correctIssuesBefore, ABJ_404_Solution_DataAccess->correctDuplicateLookupValues, ABJ_404_Solution_DataAccess->queryAndGetResults
[27-Nov-2025 17:50:23 UTC] WordPress database error Table 'wordpress.wp_abj404_spelling_cache' doesn't exist for query delete from wp_abj404_spelling_cache where matchdata is null or matchdata = '' made by activate_plugin, plugin_sandbox_scrape, include_once('/plugins/404-solution/404-solution.php'), require_once('/plugins/404-solution/includes/Loader.php'), ABJ_404_Solution_SpellChecker::init, ABJ_404_Solution_SpellChecker::getInstance, ABJ_404_Solution_SpellChecker->__construct, ABJ_404_Solution_PluginLogic->getOptions, ABJ_404_Solution_PluginLogic->updateToNewVersion, ABJ_404_Solution_PluginLogic->updateToNewVersionAction, ABJ_404_Solution_DatabaseUpgradesEtc->createDatabaseTables, ABJ_404_Solution_DatabaseUpgradesEtc->reallyCreateDatabaseTables, ABJ_404_Solution_DatabaseUpgradesEtc->correctIssuesBefore, ABJ_404_Solution_DatabaseUpgradesEtc->correctMatchData, ABJ_404_Solution_DataAccess->queryAndGetResults
See also: All tests for this plugin, How to Hide 404 Solution Admin Menus and Meta Boxes