Report - Header Footer Code Manager 1.1.42

Does Header Footer Code Manager work with WordPress 6.8.3 and PHP 8.1.12? A smoke test was performed on 2025-09-30 20:27:36 UTC.

Summary

Errors

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

Performance

Memory usage: 16.39 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	6.8.3
PHP version	8.1.12
MySQL version	10.6.10
PHP memory limit	512M

Plugin Info

Last updated	2025-08-27T14:07:00+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=9cb1a5a153
Aspect	after-activation
HTTP status	200
Load time	0.310 s
Memory usage	3.54 MiB
JS errors	None
Resource errors	None

HFCM

URL	/wp-admin/admin.php?page=hfcm-list
Aspect	menu-item
HTTP status	200
Load time	0.297 s
Memory usage	3.51 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	0.570 s
Memory usage	3.65 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=6.8.3:170:55)\n at e (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-codemirror,underscore&ver=6.8.3:2:27028)\n at t (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-codemirror,underscore&ver=6.8.3:2:27330)", "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	0.182 s
Memory usage	3.51 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=6.8.3:150:106)\n at e (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils&ver=6.8.3:2:27028)\n at t (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils&ver=6.8.3:2:27330)", "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=6.8.3:138:38)\n at c (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils&ver=6.8.3:2:25304)\n at Object.fireWith [as resolveWith] (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils&ver=6.8.3:2:26053)\n at l (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils&ver=6.8.3:2:77782)\n at XMLHttpRequest.<anonymous> (/wp-admin/load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils&ver=6.8.3:2:80265)", "trace": null, "code": null } ]
Resource errors	None

Test site – Just another WordPress site

URL	/
Aspect	front-page
HTTP status	200
Load time	0.192 s
Memory usage	3.44 MiB
JS errors	None
Resource errors	None

Benchmark

URL	Load time			Memory usage
URL	Inactive	Active	Change	Inactive	Active	Change
/wp-admin/index.php	0.391 s	0.266 s	-0.125 s	3.51 MiB	3.53 MiB	+ 22.79 KiB
/wp-admin/edit.php	0.221 s	0.190 s	-0.031 s	3.57 MiB	3.59 MiB	+ 23.53 KiB
/wp-admin/post-new.php	0.867 s	0.669 s	-0.198 s	6.06 MiB	6.09 MiB	+ 26.87 KiB
/wp-admin/upload.php	0.826 s	0.501 s	-0.325 s	3.52 MiB	3.53 MiB	+ 6.44 KiB
/wp-admin/options-writing.php	0.241 s	0.213 s	-0.028 s	3.5 MiB	3.51 MiB	+ 10.12 KiB
/wp-admin/media-new.php	0.280 s	0.255 s	-0.025 s	3.49 MiB	3.51 MiB	+ 18.31 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.201 s	0.208 s	+0.007 s	3.5 MiB	3.53 MiB	+ 28.99 KiB
/wp-admin/post-new.php?post_type=page	0.798 s	0.621 s	-0.177 s	6.05 MiB	6.07 MiB	+ 22.39 KiB
/wp-admin/options-discussion.php	0.529 s	0.430 s	-0.099 s	3.5 MiB	3.51 MiB	+ 6.62 KiB
/wp-admin/edit-comments.php	0.286 s	0.221 s	-0.065 s	3.52 MiB	3.53 MiB	+ 6.12 KiB
/	0.327 s	0.556 s	+0.229 s	3.43 MiB	3.44 MiB	+ 8.15 KiB
Average	0.452 s	0.375 s	-0.076 s	3.97 MiB	3.99 MiB	+ 16.39 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	63.2%	1,930	253	5
	CSS	20.0%	612	17	3
	PO File	9.2%	281	269	1
	JavaScript	7.6%	231	21	3
	SVG	0.0%	1	0	1
Total			3,055	560	13

PHP Code Analysis | More results »

Lines of code	1,811
Total complexity	299
Median class complexity	147.5
Median method complexity	2.0
Most complex class	NNR_HFCM
Most complex function	NNR_HFCM::hfcm_add_snippets()

Classes	2
Methods	49
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

[30-Sep-2025 20:27:55 UTC] PHP Deprecated:  json_decode(): Passing null to parameter #1 ($json) of type string is deprecated in /wp-content/plugins/header-footer-code-manager/99robots-header-footer-code-manager.php on line 859
[30-Sep-2025 20:27:55 UTC] PHP Deprecated:  json_decode(): Passing null to parameter #1 ($json) of type string is deprecated in /wp-content/plugins/header-footer-code-manager/99robots-header-footer-code-manager.php on line 862

Header Footer Code Manager 1.1.42