1. Home
2. 404 Solution
3. 3.1.4

404 Solution 3.1.4

Does 404 Solution work with WordPress 6.9 and PHP 8.1.12? A smoke test was performed on 2025-12-18 13:56:55 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	0.465 s	0.363 s	-0.102 s	3.77 MiB	3.89 MiB	+ 124.52 KiB
/wp-admin/edit.php	0.444 s	0.355 s	-0.089 s	3.78 MiB	4.25 MiB	+ 476.67 KiB
/wp-admin/post-new.php	0.815 s	1.116 s	+0.301 s	6.3 MiB	6.58 MiB	+ 282.35 KiB
/wp-admin/upload.php	0.482 s	0.567 s	+0.085 s	3.74 MiB	3.84 MiB	+ 107.25 KiB
/wp-admin/options-writing.php	0.373 s	0.317 s	-0.056 s	3.71 MiB	3.82 MiB	+ 111.27 KiB
/wp-admin/media-new.php	0.542 s	0.304 s	-0.238 s	3.7 MiB	3.82 MiB	+ 119.44 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.368 s	0.310 s	-0.058 s	3.71 MiB	3.84 MiB	+ 130.39 KiB
/wp-admin/post-new.php?post_type=page	0.721 s	0.699 s	-0.022 s	6.29 MiB	6.57 MiB	+ 280.36 KiB
/wp-admin/options-discussion.php	0.361 s	0.495 s	+0.134 s	3.71 MiB	3.82 MiB	+ 107.77 KiB
/wp-admin/edit-comments.php	0.346 s	0.348 s	+0.002 s	3.73 MiB	3.84 MiB	+ 107.27 KiB
/	0.292 s	0.207 s	-0.085 s	4.1 MiB	4.14 MiB	+ 41.13 KiB
Average	0.474 s	0.462 s	-0.012 s	4.23 MiB	4.4 MiB	+ 171.67 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	42.2%	18,467	1,384	13
	PHP	37.6%	16,456	5,116	40
	CSS	8.1%	3,527	364	4
	JavaScript	4.4%	1,907	565	17
	Markdown	3.5%	1,526	0	2
	HTML	3.0%	1,303	38	40
	SQL	1.2%	541	125	35
	JSON	0.1%	45	0	1
Total			43,772	7,592	152

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 6

• wp_abj404_logsv2
• wp_abj404_lookup
• wp_abj404_ngram_cache
• wp_abj404_permalink_cache
• wp_abj404_redirects
• wp_abj404_spelling_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 16 lines

[18-Dec-2025 13:57:15 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_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
[18-Dec-2025 13:57:15 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_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

---