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404 Solution 4.1.4

Does 404 Solution work with WordPress 6.9.4 and PHP 8.1.12? A smoke test was performed on 2026-04-21 03:46:23 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	1.041 s	0.819 s	-0.222 s	3.78 MiB	4.48 MiB	+ 717.59 KiB
/wp-admin/edit.php	0.490 s	0.515 s	+0.025 s	3.79 MiB	4.54 MiB	+ 767.61 KiB
/wp-admin/post-new.php	1.132 s	1.265 s	+0.133 s	6.31 MiB	7.17 MiB	+ 880.34 KiB
/wp-admin/upload.php	0.514 s	0.417 s	-0.097 s	3.74 MiB	4.42 MiB	+ 699.13 KiB
/wp-admin/options-writing.php	0.326 s	0.304 s	-0.022 s	3.72 MiB	4.4 MiB	+ 703.13 KiB
/wp-admin/media-new.php	0.525 s	0.315 s	-0.210 s	3.71 MiB	4.4 MiB	+ 711.32 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.331 s	0.449 s	+0.118 s	3.72 MiB	4.42 MiB	+ 721.99 KiB
/wp-admin/post-new.php?post_type=page	0.935 s	0.789 s	-0.146 s	6.3 MiB	7.15 MiB	+ 873.35 KiB
/wp-admin/options-discussion.php	0.788 s	0.398 s	-0.390 s	3.72 MiB	4.4 MiB	+ 699.62 KiB
/wp-admin/edit-comments.php	0.454 s	0.344 s	-0.110 s	3.74 MiB	4.42 MiB	+ 699.13 KiB
/	0.455 s	0.262 s	-0.193 s	4.12 MiB	4.44 MiB	+ 322.58 KiB
Average	0.636 s	0.534 s	-0.101 s	4.24 MiB	4.93 MiB	+ 708.71 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	42.9%	29,432	2,692	13
	PHP	41.8%	28,702	9,719	94
	CSS	6.0%	4,130	388	4
	JavaScript	4.3%	2,986	551	19
	HTML	2.3%	1,573	43	45
	Markdown	1.7%	1,198	0	2
	SQL	0.9%	613	131	40
	JSON	0.1%	45	0	1
Total			68,679	13,524	218

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

[21-Apr-2026 03:46:51 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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