Report - Header Footer Code Manager 1.1.45

Does Header Footer Code Manager work with WordPress 7.0 and PHP 8.1.12? A smoke test was performed on 2026-06-11 13:42:34 UTC.

Summary

Errors

2	PHP deprecation warnings
3	JavaScript exceptions
	All test pages loaded successfully
	No resource errors

Performance

Memory usage: 16.95 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	2026-06-11T13:25:00+00:00
Active installs	600,000+
WordPress.org page	https://wordpress.org/plugins/header-footer-code-manager/
Badges	Get badge code

Pages 5

Plugins ‹ Test site — WordPress

URL	/wp-admin/plugins.php?plugin_status=all&paged=1&s
Requested URL	/wp-admin/plugins.php?action=activate&plugin=header-footer-code-manager%2F99robots-header-footer-code-manager.php&plugin_status=all&paged=1&s&_wpnonce=18aa942a8a
Aspect	after-activation
HTTP status	200
Load time	0.708 s
Memory usage	3.91 MiB
JS errors	None
Resource errors	None

HFCM

URL	/wp-admin/admin.php?page=hfcm-list
Aspect	menu-item
HTTP status	200
Load time	0.529 s
Memory usage	3.87 MiB
JS errors	None
Resource errors	None

HFCM → Add New

URL	/wp-admin/admin.php?page=hfcm-create
Aspect	menu-item
HTTP status	200
Load time	0.946 s
Memory usage	4 MiB
JS errors	[ { "message": "TypeError: Cannot read properties of null (reading 'addEventListener')\n at HTMLDocument.<anonymous> (/wp-content/plugins/header-footer-code-manager/js/nnr-hfcm-showboxes.js?ver=7.0:170:55)\n at e (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-codemirror,underscore&ver=7.0:2:27028)\n at t (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-codemirror,underscore&ver=7.0:2:27330)", "trace": null, "code": null } ]
Resource errors	None

HFCM → Tools

URL	/wp-admin/admin.php?page=hfcm-tools
Aspect	menu-item
HTTP status	200
Load time	0.515 s
Memory usage	3.87 MiB
JS errors	[ { "message": "TypeError: $(...).selectize is not a function\n at HTMLDocument.<anonymous> (/wp-content/plugins/header-footer-code-manager/js/nnr-hfcm-showboxes.js?ver=7.0:150:106)\n at e (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils&ver=7.0:2:27028)\n at t (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils&ver=7.0:2:27330)", "trace": null, "code": null }, { "message": "TypeError: $(...).selectize is not a function\n at Object.success (/wp-content/plugins/header-footer-code-manager/js/nnr-hfcm-showboxes.js?ver=7.0:138:38)\n at c (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils&ver=7.0:2:25304)\n at Object.fireWith [as resolveWith] (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils&ver=7.0:2:26053)\n at l (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils&ver=7.0:2:77782)\n at XMLHttpRequest.<anonymous> (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils&ver=7.0:2:80265)", "trace": null, "code": null } ]
Resource errors	None

Test site – Just another WordPress site

URL	/
Aspect	front-page
HTTP status	200
Load time	0.241 s
Memory usage	4.24 MiB
JS errors	None
Resource errors	None

Benchmark

URL	Load time			Memory usage
URL	Inactive	Active	Change	Inactive	Active	Change
/wp-admin/index.php	0.828 s	0.714 s	-0.114 s	3.93 MiB	3.95 MiB	+ 23.88 KiB
/wp-admin/edit.php	0.591 s	0.875 s	+0.284 s	3.98 MiB	4 MiB	+ 23.16 KiB
/wp-admin/post-new.php	2.153 s	1.667 s	-0.486 s	6.56 MiB	6.59 MiB	+ 28.62 KiB
/wp-admin/upload.php	0.785 s	0.651 s	-0.134 s	3.89 MiB	3.9 MiB	+ 7.8 KiB
/wp-admin/options-writing.php	0.630 s	0.537 s	-0.093 s	3.86 MiB	3.87 MiB	+ 11.17 KiB
/wp-admin/media-new.php	1.152 s	0.868 s	-0.284 s	3.85 MiB	3.87 MiB	+ 19.37 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.586 s	0.618 s	+0.032 s	3.86 MiB	3.89 MiB	+ 24.54 KiB
/wp-admin/post-new.php?post_type=page	1.558 s	1.968 s	+0.410 s	6.55 MiB	6.57 MiB	+ 24.14 KiB
/wp-admin/options-discussion.php	0.813 s	0.682 s	-0.131 s	3.86 MiB	3.87 MiB	+ 7.67 KiB
/wp-admin/edit-comments.php	0.610 s	0.537 s	-0.073 s	3.89 MiB	3.89 MiB	+ 7.17 KiB
/	0.372 s	0.199 s	-0.173 s	4.23 MiB	4.24 MiB	+ 8.95 KiB
Average	0.916 s	0.847 s	-0.069 s	4.41 MiB	4.42 MiB	+ 16.95 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

CSS

PO File

Language		%	Lines of code	Comment lines	Files
	PHP	65.1%	2,104	281	6
	CSS	19.0%	613	17	3
	PO File	8.7%	281	269	1
	JavaScript	7.2%	231	21	3
	SVG	0.0%	1	0	1
Total			3,230	588	14

PHP Code Analysis | More results »

Lines of code	1,939
Total complexity	329
Median class complexity	162.5
Median method complexity	2.0
Most complex class	NNR_HFCM
Most complex function	NNR_HFCM::hfcm_add_snippets()

Classes	2
Methods	55
Functions	1

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 1

wp_hfcm_scripts

Options `wp_options` 2

hfcm_activation_date
hfcm_db_version

PHP Error Log 2 lines

[11-Jun-2026 13:43:08 UTC] PHP Deprecated:  json_decode(): Passing null to parameter #1 ($json) of type string is deprecated in /wp-content/plugins/header-footer-code-manager/99robots-header-footer-code-manager.php on line 1014
[11-Jun-2026 13:43:08 UTC] PHP Deprecated:  json_decode(): Passing null to parameter #1 ($json) of type string is deprecated in /wp-content/plugins/header-footer-code-manager/99robots-header-footer-code-manager.php on line 1017

Header Footer Code Manager 1.1.45