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404 Solution 3.3.3

Does 404 Solution work with WordPress 6.9.4 and PHP 8.1.12? A smoke test was performed on 2026-03-19 13:37:06 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	0.372 s	0.365 s	-0.007 s	3.78 MiB	4.1 MiB	+ 329.29 KiB
/wp-admin/edit.php	0.363 s	0.334 s	-0.029 s	3.78 MiB	4.15 MiB	+ 379.31 KiB
/wp-admin/post-new.php	0.846 s	1.095 s	+0.249 s	6.31 MiB	6.71 MiB	+ 408.6 KiB
/wp-admin/upload.php	0.634 s	0.432 s	-0.202 s	3.74 MiB	4.04 MiB	+ 311.15 KiB
/wp-admin/options-writing.php	0.311 s	0.297 s	-0.014 s	3.71 MiB	4.02 MiB	+ 315.14 KiB
/wp-admin/media-new.php	0.495 s	0.304 s	-0.191 s	3.7 MiB	4.02 MiB	+ 323.34 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.469 s	0.298 s	-0.171 s	3.72 MiB	4.04 MiB	+ 334.01 KiB
/wp-admin/post-new.php?post_type=page	0.668 s	0.710 s	+0.042 s	6.3 MiB	6.69 MiB	+ 402.09 KiB
/wp-admin/options-discussion.php	0.328 s	0.393 s	+0.065 s	3.71 MiB	4.02 MiB	+ 311.64 KiB
/wp-admin/edit-comments.php	0.322 s	0.325 s	+0.003 s	3.73 MiB	4.04 MiB	+ 311.13 KiB
/	0.271 s	0.187 s	-0.084 s	4.11 MiB	4.13 MiB	+ 20.81 KiB
Average	0.462 s	0.431 s	-0.031 s	4.24 MiB	4.54 MiB	+ 313.32 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	41.5%	22,278	7,471	54
	PO File	39.6%	21,305	2,385	13
	CSS	6.9%	3,710	370	4
	JavaScript	5.3%	2,844	606	18
	Markdown	3.0%	1,637	0	2
	HTML	2.5%	1,342	38	40
	SQL	1.1%	576	128	38
	JSON	0.1%	45	0	1
Total			53,737	10,998	170

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 35 lines

[19-Mar-2026 13:37:25 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
[19-Mar-2026 13:37:25 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
[19-Mar-2026 13:37:25 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
[19-Mar-2026 13:37:25 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
[19-Mar-2026 13:37:25 UTC] WordPress database error You can't delete all columns with ALTER TABLE; use DROP TABLE instead for query alter table wp_abj404_view_cache drop updated_at 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->runInitialCreateTables, ABJ_404_Solution_DatabaseUpgradesEtc->verifyColumns, ABJ_404_Solution_DatabaseUpgradesEtc->updateATableBasedOnDifferences, ABJ_404_Solution_DataAccess->queryAndGetResults
[19-Mar-2026 13:37:25 UTC] WordPress database error Key column 'refreshed_at' doesn't exist in table for query alter table wp_abj404_view_cache add index `refreshed_at` (refreshed_at) 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->createIndexes, ABJ_404_Solution_DatabaseUpgradesEtc->verifyIndexes, ABJ_404_Solution_DataAccess->queryAndGetResults
[19-Mar-2026 13:37:26 UTC] WordPress database error Key column 'refreshed_at' doesn't exist in table for query alter table wp_abj404_view_cache add index `refreshed_at` (refreshed_at) made by activate_plugin, do_action('activate_404-solution/404-solution.php'), WP_Hook->do_action, WP_Hook->apply_filters, ABJ_404_Solution_PluginLogic::runOnPluginActivation, ABJ_404_Solution_PluginLogic::activateSingleSite, ABJ_404_Solution_DatabaseUpgradesEtc->createDatabaseTables, ABJ_404_Solution_DatabaseUpgradesEtc->reallyCreateDatabaseTables, ABJ_404_Solution_DatabaseUpgradesEtc->createIndexes, ABJ_404_Solution_DatabaseUpgradesEtc->verifyIndexes, ABJ_404_Solution_DataAccess->queryAndGetResults

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