404 Solution 3.0.2

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: 72.49 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 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=404-solution%2F404-solution.php&plugin_status=all&paged=1&s&_wpnonce=d73928f489
Aspect after-activation
HTTP status 200
Load time 2.146 s
Memory usage 3.71 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 0.333 s
Memory usage 3.71 MiB
JS errors None
Resource errors None

Settings → 404 Solution → Captured 404 URLs

Page screenshot: Settings → 404 Solution → Captured 404 URLs
URL /wp-admin/options-general.php?page=abj404_solution&subpage=abj404_captured
Aspect menu-item-tab
HTTP status 200
Load time 0.226 s
Memory usage 3.69 MiB
JS errors None
Resource errors None

Settings → 404 Solution → Logs

Page screenshot: Settings → 404 Solution → Logs
URL /wp-admin/options-general.php?page=abj404_solution&subpage=abj404_logs
Aspect menu-item-tab
HTTP status 200
Load time 0.172 s
Memory usage 3.69 MiB
JS errors None
Resource errors None

Settings → 404 Solution → Stats

Page screenshot: Settings → 404 Solution → Stats
URL /wp-admin/options-general.php?page=abj404_solution&subpage=abj404_stats
Aspect menu-item-tab
HTTP status 200
Load time 0.185 s
Memory usage 3.69 MiB
JS errors None
Resource errors None

Settings → 404 Solution → Tools

Page screenshot: Settings → 404 Solution → Tools
URL /wp-admin/options-general.php?page=abj404_solution&subpage=abj404_tools
Aspect menu-item-tab
HTTP status 200
Load time 0.185 s
Memory usage 3.69 MiB
JS errors None
Resource errors None

Settings → 404 Solution → Options

Page screenshot: Settings → 404 Solution → Options
URL /wp-admin/options-general.php?page=abj404_solution&subpage=abj404_options
Aspect menu-item-tab
HTTP status 200
Load time 0.190 s
Memory usage 3.69 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 0.167 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.php0.326 s0.292 s-0.034 s3.51 MiB3.57 MiB+ 70.29 KiB
/wp-admin/edit.php0.192 s0.182 s-0.010 s3.57 MiB3.66 MiB+ 90.28 KiB
/wp-admin/post-new.php0.750 s1.061 s+0.311 s6.06 MiB6.2 MiB+ 139.52 KiB
/wp-admin/upload.php0.559 s0.440 s-0.119 s3.52 MiB3.58 MiB+ 53.02 KiB
/wp-admin/options-writing.php0.217 s0.189 s-0.028 s3.5 MiB3.56 MiB+ 57.05 KiB
/wp-admin/media-new.php0.258 s0.226 s-0.032 s3.49 MiB3.56 MiB+ 65.21 KiB
/wp-admin/edit-tags.php?taxonomy=category0.192 s0.184 s-0.008 s3.5 MiB3.58 MiB+ 76.16 KiB
/wp-admin/post-new.php?post_type=page0.585 s0.587 s+0.002 s6.05 MiB6.18 MiB+ 135.63 KiB
/wp-admin/options-discussion.php0.474 s0.275 s-0.199 s3.5 MiB3.55 MiB+ 53.55 KiB
/wp-admin/edit-comments.php0.232 s0.388 s+0.156 s3.52 MiB3.57 MiB+ 53.04 KiB
/0.294 s0.226 s-0.068 s3.47 MiB3.47 MiB+ 3.59 KiB
Average 0.371 s0.368 s-0.003 s3.97 MiB4.04 MiB+ 72.49 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
Language % Lines of code Comment lines Files
PO File42.1%12,75027112
PHP40.8%12,3743,75335
Markdown4.7%1,42202
JavaScript3.9%1,17934112
HTML3.7%1,1363438
CSS2.8%859982
SQL1.8%54212535
JSON0.1%4501
Total 30,307 4,622 137

PHP Code Analysis | More results »

Lines of code 12,388
Total complexity 2,653
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 32
Methods 504
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 7

Options wp_options 3

PHP Error Log 16 lines

[22-Nov-2025 13:12:13 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
[22-Nov-2025 13:12:13 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