Report - FW Fussnoten 0.6.4

Does FW Fussnoten work with WordPress 7.0 and PHP 8.1.12? A smoke test was performed on 2026-06-16 21:00:59 UTC.

Summary

Errors

14	PHP fatal errors
2	PHP warnings
	No JavaScript exceptions
1	Page failed to load 1 500 Internal Server Error
	No resource errors

Performance

Memory usage: 22.85 KiB
The average PHP memory usage increased by this amount after activating by the plugin.

Page speed impact: insignificant.
The plugin didn't make the site noticeably slower.

Environment

WordPress version	7.0
PHP version	8.1.12
MySQL version	10.6.10
PHP memory limit	512M

Plugin Info

Last updated	2014-02-23T00:49:00+00:00
Active installs	<10
WordPress.org page	https://wordpress.org/plugins/fw-fussnoten/
Badges	Get badge code

Pages 2

WordPress › Error

URL	/wp-admin/plugins.php?activate=true&plugin_status=all&paged=1&s=
Requested URL	/wp-admin/plugins.php?action=activate&plugin=fw-fussnoten%2Ffwfussnoten.php&plugin_status=all&paged=1&s&_wpnonce=b508ec6309
Aspect	after-activation
HTTP status	500
Load time	0.121 s
Memory usage	N/A
JS errors	None
Resource errors	None

Test site – Just another WordPress site

URL	/
Aspect	front-page
HTTP status	200
Load time	0.238 s
Memory usage	4.25 MiB
JS errors	None
Resource errors	None

Benchmark

URL	Load time			Memory usage
URL	Inactive	Active	Change	Inactive	Active	Change
/	0.303 s	0.183 s	-0.120 s	4.23 MiB	4.25 MiB	+ 22.85 KiB
Average	0.303 s	0.183 s	-0.120 s	4.23 MiB	4.25 MiB	+ 22.85 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.

PHP

Language		%	Lines of code	Comment lines	Files
	PHP	100.0%	192	92	1
Total			192	92	1

PHP Code Analysis | More results »

Lines of code	198
Total complexity	29
Median class complexity	0.0
Median method complexity	0.0
Most complex class	—
Most complex function	fw_fussnote_filter()

Classes	0
Methods	0
Functions	12

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.

No new entries found.

PHP Error Log 142 lines

[16-Jun-2026 21:01:26 UTC] PHP Fatal error:  Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "fussnote_option_menu" not found or invalid function name in /wp-includes/class-wp-hook.php:341
Stack trace:
#0 /wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()
#1 /wp-includes/plugin.php(522): WP_Hook->do_action()
#2 /wp-admin/includes/menu.php(168): do_action()
#3 /wp-admin/menu.php(441): require_once('...')
#4 /wp-admin/admin.php(163): require('...')
#5 /wp-admin/plugins.php(10): require_once('...')
#6 {main}
  thrown in /wp-includes/class-wp-hook.php on line 341
[16-Jun-2026 21:01:27 UTC] PHP Fatal error:  Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "fussnote_option_menu" not found or invalid function name in /wp-includes/class-wp-hook.php:341
Stack trace:
#0 /wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()
#1 /wp-includes/plugin.php(522): WP_Hook->do_action()
#2 /wp-admin/includes/menu.php(168): do_action()
#3 /wp-admin/menu.php(441): require_once('...')
#4 /wp-admin/admin.php(163): require('...')
#5 /wp-admin/index.php(10): require_once('...')
#6 {main}
  thrown in /wp-includes/class-wp-hook.php on line 341
[16-Jun-2026 21:01:27 UTC] PHP Warning:  Undefined variable $fusscontent in /wp-content/plugins/fw-fussnoten/fwfussnoten.php on line 123
[16-Jun-2026 21:01:28 UTC] PHP Fatal error:  Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "fussnote_option_menu" not found or invalid function name in /wp-includes/class-wp-hook.php:341
Stack trace:
#0 /wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()
#1 /wp-includes/plugin.php(522): WP_Hook->do_action()
#2 /wp-admin/includes/menu.php(168): do_action()
#3 /wp-admin/menu.php(441): require_once('...')
#4 /wp-admin/admin.php(163): require('...')
#5 /wp-admin/index.php(10): require_once('...')
#6 {main}
  thrown in /wp-includes/class-wp-hook.php on line 341
[16-Jun-2026 21:01:28 UTC] PHP Fatal error:  Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "fussnote_option_menu" not found or invalid function name in /wp-includes/class-wp-hook.php:341
Stack trace:
#0 /wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()
#1 /wp-includes/plugin.php(522): WP_Hook->do_action()
#2 /wp-admin/includes/menu.php(168): do_action()
#3 /wp-admin/menu.php(441): require_once('...')
#4 /wp-admin/admin.php(163): require('...')
#5 /wp-admin/edit.php(10): require_once('...')
#6 {main}
  thrown in /wp-includes/class-wp-hook.php on line 341
[16-Jun-2026 21:01:28 UTC] PHP Fatal error:  Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "fussnote_option_menu" not found or invalid function name in /wp-includes/class-wp-hook.php:341
Stack trace:
#0 /wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()
#1 /wp-includes/plugin.php(522): WP_Hook->do_action()
#2 /wp-admin/includes/menu.php(168): do_action()
#3 /wp-admin/menu.php(441): require_once('...')
#4 /wp-admin/admin.php(163): require('...')
#5 /wp-admin/post-new.php(10): require_once('...')
#6 {main}
  thrown in /wp-includes/class-wp-hook.php on line 341
[16-Jun-2026 21:01:28 UTC] PHP Fatal error:  Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "fussnote_option_menu" not found or invalid function name in /wp-includes/class-wp-hook.php:341
Stack trace:
#0 /wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()
#1 /wp-includes/plugin.php(522): WP_Hook->do_action()
#2 /wp-admin/includes/menu.php(168): do_action()
#3 /wp-admin/menu.php(441): require_once('...')
#4 /wp-admin/admin.php(163): require('...')
#5 /wp-admin/upload.php(10): require_once('...')
#6 {main}
  thrown in /wp-includes/class-wp-hook.php on line 341
[16-Jun-2026 21:01:28 UTC] PHP Fatal error:  Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "fussnote_option_menu" not found or invalid function name in /wp-includes/class-wp-hook.php:341
Stack trace:
#0 /wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()
#1 /wp-includes/plugin.php(522): WP_Hook->do_action()
#2 /wp-admin/includes/menu.php(168): do_action()
#3 /wp-admin/menu.php(441): require_once('...')
#4 /wp-admin/admin.php(163): require('...')
#5 /wp-admin/options-writing.php(10): require_once('...')
#6 {main}
  thrown in /wp-includes/class-wp-hook.php on line 341
[16-Jun-2026 21:01:28 UTC] PHP Fatal error:  Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "fussnote_option_menu" not found or invalid function name in /wp-includes/class-wp-hook.php:341
Stack trace:
#0 /wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()
#1 /wp-includes/plugin.php(522): WP_Hook->do_action()
#2 /wp-admin/includes/menu.php(168): do_action()
#3 /wp-admin/menu.php(441): require_once('...')
#4 /wp-admin/admin.php(163): require('...')
#5 /wp-admin/media-new.php(13): require_once('...')
#6 {main}
  thrown in /wp-includes/class-wp-hook.php on line 341
[16-Jun-2026 21:01:28 UTC] PHP Fatal error:  Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "fussnote_option_menu" not found or invalid function name in /wp-includes/class-wp-hook.php:341
Stack trace:
#0 /wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()
#1 /wp-includes/plugin.php(522): WP_Hook->do_action()
#2 /wp-admin/includes/menu.php(168): do_action()
#3 /wp-admin/menu.php(441): require_once('...')
#4 /wp-admin/admin.php(163): require('...')
#5 /wp-admin/edit-tags.php(10): require_once('...')
#6 {main}
  thrown in /wp-includes/class-wp-hook.php on line 341
[16-Jun-2026 21:01:29 UTC] PHP Fatal error:  Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "fussnote_option_menu" not found or invalid function name in /wp-includes/class-wp-hook.php:341
Stack trace:
#0 /wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()
#1 /wp-includes/plugin.php(522): WP_Hook->do_action()
#2 /wp-admin/includes/menu.php(168): do_action()
#3 /wp-admin/menu.php(441): require_once('...')
#4 /wp-admin/admin.php(163): require('...')
#5 /wp-admin/post-new.php(10): require_once('...')
#6 {main}

(+42 more lines)