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404 Solution 4.1.6

Does 404 Solution work with WordPress 6.9.4 and PHP 8.1.12? A smoke test was performed on 2026-04-24 11:26:26 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	0.405 s	0.351 s	-0.054 s	3.78 MiB	4.49 MiB	+ 730.36 KiB
/wp-admin/edit.php	0.356 s	0.706 s	+0.350 s	3.79 MiB	4.55 MiB	+ 780.38 KiB
/wp-admin/post-new.php	0.867 s	0.984 s	+0.117 s	6.31 MiB	7.18 MiB	+ 893.12 KiB
/wp-admin/upload.php	0.547 s	0.414 s	-0.133 s	3.74 MiB	4.44 MiB	+ 711.91 KiB
/wp-admin/options-writing.php	0.327 s	0.300 s	-0.027 s	3.72 MiB	4.41 MiB	+ 715.9 KiB
/wp-admin/media-new.php	0.505 s	0.303 s	-0.202 s	3.71 MiB	4.41 MiB	+ 724.09 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.419 s	0.305 s	-0.114 s	3.72 MiB	4.44 MiB	+ 734.77 KiB
/wp-admin/post-new.php?post_type=page	0.672 s	0.654 s	-0.018 s	6.3 MiB	7.17 MiB	+ 886.13 KiB
/wp-admin/options-discussion.php	0.343 s	0.367 s	+0.024 s	3.72 MiB	4.41 MiB	+ 712.4 KiB
/wp-admin/edit-comments.php	0.314 s	0.307 s	-0.007 s	3.74 MiB	4.43 MiB	+ 711.9 KiB
/	0.420 s	0.216 s	-0.204 s	4.12 MiB	4.44 MiB	+ 327.35 KiB
Average	0.470 s	0.446 s	-0.024 s	4.24 MiB	4.94 MiB	+ 720.75 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
	PO File	43.1%	30,706	2,896	13
	PHP	41.6%	29,612	10,062	94
	CSS	5.9%	4,224	392	4
	JavaScript	4.5%	3,204	570	20
	HTML	2.2%	1,581	43	45
	Markdown	1.8%	1,256	0	2
	SQL	0.9%	621	131	41
	JSON	0.1%	45	0	1
Total			71,249	14,094	220

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 9

• wp_abj404_engine_profiles
• wp_abj404_logsv2
• wp_abj404_lookup
• wp_abj404_ngram_cache
• wp_abj404_permalink_cache
• wp_abj404_redirect_conditions
• 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 15 lines

[24-Apr-2026 11:26:45 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

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