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404 Solution 4.1.5

Does 404 Solution work with WordPress 6.9.4 and PHP 8.1.12? A smoke test was performed on 2026-04-22 22:24:48 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	0.421 s	0.363 s	-0.058 s	3.78 MiB	4.48 MiB	+ 725.38 KiB
/wp-admin/edit.php	0.366 s	0.331 s	-0.035 s	3.78 MiB	4.54 MiB	+ 775.41 KiB
/wp-admin/post-new.php	0.889 s	1.243 s	+0.354 s	6.31 MiB	7.17 MiB	+ 888.15 KiB
/wp-admin/upload.php	0.632 s	0.558 s	-0.074 s	3.74 MiB	4.43 MiB	+ 706.93 KiB
/wp-admin/options-writing.php	0.344 s	0.335 s	-0.009 s	3.71 MiB	4.41 MiB	+ 710.92 KiB
/wp-admin/media-new.php	0.512 s	0.334 s	-0.178 s	3.7 MiB	4.41 MiB	+ 719.12 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.443 s	0.309 s	-0.134 s	3.72 MiB	4.43 MiB	+ 729.79 KiB
/wp-admin/post-new.php?post_type=page	0.697 s	0.696 s	-0.001 s	6.3 MiB	7.16 MiB	+ 881.15 KiB
/wp-admin/options-discussion.php	0.330 s	0.343 s	+0.013 s	3.71 MiB	4.41 MiB	+ 707.42 KiB
/wp-admin/edit-comments.php	0.328 s	0.343 s	+0.015 s	3.73 MiB	4.43 MiB	+ 706.92 KiB
/	0.287 s	0.205 s	-0.082 s	4.11 MiB	4.42 MiB	+ 324.78 KiB
Average	0.477 s	0.460 s	-0.017 s	4.24 MiB	4.93 MiB	+ 716 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	43.2%	30,602	2,857	13
	PHP	41.5%	29,356	9,927	94
	CSS	6.0%	4,224	392	4
	JavaScript	4.4%	3,126	567	20
	HTML	2.2%	1,580	43	45
	Markdown	1.7%	1,230	0	2
	SQL	0.9%	613	131	40
	JSON	0.1%	45	0	1
Total			70,776	13,917	219

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

[22-Apr-2026 22:25:07 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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