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404 Solution 3.2.1

Does 404 Solution work with WordPress 6.9.4 and PHP 8.1.12? A smoke test was performed on 2026-03-12 13:07:54 UTC.

Summary

Pages 5

Plugins ‹ Test site — WordPress

Settings → 404 Solution

Test site – Just another WordPress site

Add Post ‹ Test site — WordPress

Add Page ‹ Test site — WordPress

Benchmark

URL	Load time			Memory usage
	Inactive	Active	Change	Inactive	Active	Change
/wp-admin/index.php	0.443 s	0.375 s	-0.068 s	3.78 MiB	4.05 MiB	+ 278.09 KiB
/wp-admin/edit.php	0.374 s	0.317 s	-0.057 s	3.78 MiB	4.1 MiB	+ 328.12 KiB
/wp-admin/post-new.php	0.884 s	0.876 s	-0.008 s	6.31 MiB	6.65 MiB	+ 352.27 KiB
/wp-admin/upload.php	0.465 s	0.484 s	+0.019 s	3.74 MiB	3.99 MiB	+ 259.95 KiB
/wp-admin/options-writing.php	0.347 s	0.344 s	-0.003 s	3.71 MiB	3.97 MiB	+ 263.95 KiB
/wp-admin/media-new.php	0.513 s	0.331 s	-0.182 s	3.7 MiB	3.97 MiB	+ 272.14 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.325 s	0.775 s	+0.450 s	3.72 MiB	3.99 MiB	+ 282.81 KiB
/wp-admin/post-new.php?post_type=page	0.710 s	0.885 s	+0.175 s	6.3 MiB	6.63 MiB	+ 345.75 KiB
/wp-admin/options-discussion.php	0.343 s	0.359 s	+0.016 s	3.71 MiB	3.97 MiB	+ 260.45 KiB
/wp-admin/edit-comments.php	0.334 s	0.343 s	+0.009 s	3.73 MiB	3.99 MiB	+ 259.95 KiB
/	0.272 s	0.221 s	-0.051 s	4.11 MiB	4.13 MiB	+ 20.81 KiB
Average	0.455 s	0.483 s	+0.027 s	4.24 MiB	4.5 MiB	+ 265.84 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	40.3%	20,453	5,703	44
	PO File	40.1%	20,345	1,956	13
	CSS	7.3%	3,692	369	4
	JavaScript	5.4%	2,758	600	18
	Markdown	3.1%	1,586	0	2
	HTML	2.6%	1,318	38	40
	SQL	1.1%	544	125	35
	JSON	0.1%	45	0	1
Total			50,741	8,791	157

PHP Code Analysis | More results »

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

• wp_abj404_logsv2
• wp_abj404_lookup
• wp_abj404_ngram_cache
• wp_abj404_permalink_cache
• wp_abj404_redirects
• wp_abj404_spelling_cache
• wp_abj404_view_cache

Options wp_options 3

• abj404_installed_time
• abj404_ngram_rebuild_offset
• abj404_settings

Meta Boxes

{
    "post": {
        "abj404_redirect_meta_box": {
            "title": "404 Solution",
            "context": "side"
        }
    },
    "page": {
        "abj404_redirect_meta_box": {
            "title": "404 Solution",
            "context": "side"
        }
    },
    "attachment": {
        "abj404_redirect_meta_box": {
            "title": "404 Solution",
            "context": "side"
        }
    }
}

PHP Error Log 32 lines

[12-Mar-2026 13:08:13 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_ServiceContainer->get, {closure}, 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
[12-Mar-2026 13:08:14 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_ServiceContainer->get, {closure}, 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, ABJ_404_Solution_DataAccess->attemptMissingTableRepairAndRetry
[12-Mar-2026 13:08:14 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_ServiceContainer->get, {closure}, 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
[12-Mar-2026 13:08:14 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_ServiceContainer->get, {closure}, 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, ABJ_404_Solution_DataAccess->attemptMissingTableRepairAndRetry

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