1. Home
2. 404 Solution
3. 4.0.3

404 Solution 4.0.3

Does 404 Solution work with WordPress 6.9.4 and PHP 8.1.12? A smoke test was performed on 2026-03-28 21:22:13 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	0.431 s	0.357 s	-0.074 s	3.78 MiB	4.21 MiB	+ 444.59 KiB
/wp-admin/edit.php	0.367 s	0.322 s	-0.045 s	3.78 MiB	4.27 MiB	+ 494.61 KiB
/wp-admin/post-new.php	0.830 s	1.106 s	+0.276 s	6.31 MiB	6.9 MiB	+ 608.6 KiB
/wp-admin/upload.php	0.443 s	0.458 s	+0.015 s	3.74 MiB	4.16 MiB	+ 427.38 KiB
/wp-admin/options-writing.php	0.317 s	0.325 s	+0.008 s	3.71 MiB	4.13 MiB	+ 431.38 KiB
/wp-admin/media-new.php	0.493 s	0.326 s	-0.167 s	3.7 MiB	4.13 MiB	+ 439.57 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.329 s	0.306 s	-0.023 s	3.72 MiB	4.16 MiB	+ 450.24 KiB
/wp-admin/post-new.php?post_type=page	0.705 s	0.835 s	+0.130 s	6.3 MiB	6.88 MiB	+ 601.6 KiB
/wp-admin/options-discussion.php	0.342 s	0.375 s	+0.033 s	3.71 MiB	4.13 MiB	+ 427.88 KiB
/wp-admin/edit-comments.php	0.326 s	0.336 s	+0.010 s	3.73 MiB	4.15 MiB	+ 427.38 KiB
/	0.277 s	0.190 s	-0.087 s	4.11 MiB	4.16 MiB	+ 56.02 KiB
Average	0.442 s	0.449 s	+0.007 s	4.24 MiB	4.66 MiB	+ 437.2 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%	29,011	2,590	13
	PHP	41.3%	27,742	9,315	91
	CSS	6.0%	4,051	385	4
	JavaScript	4.5%	3,050	634	19
	HTML	2.3%	1,527	38	44
	Markdown	1.6%	1,096	0	2
	SQL	0.9%	613	131	40
	JSON	0.1%	45	0	1
Total			67,135	13,093	214

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

[28-Mar-2026 21:22:32 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

---