Report - Fortnox for WooCommerce 4.1.9

Does "Fortnox integration for WooCommerce" work with WordPress 5.7.2 and PHP 7.4.8? A smoke test was performed on 2021-05-31 15:02:12 UTC.

Summary

Errors

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

Performance

Memory usage: 31.66 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	5.7.2
PHP version	7.4.8
MySQL version	8.0.21
PHP memory limit	256M

Plugin Info

Last updated	2026-06-24T13:41:00+00:00
Active installs	300+
WordPress.org page	https://wordpress.org/plugins/woocommerce-fortnox-integration/
Badges	Get badge code

Pages 2

Plugins ‹ Test site — WordPress

URL	/wp-admin/plugins.php?activate=true&plugin_status=all&paged=1&s=
Requested URL	/wp-admin/plugins.php?action=activate&plugin=woocommerce-fortnox-integration%2Fplugin.php&plugin_status=all&paged=1&s&_wpnonce=9acf4a2a9b
Aspect	after-activation
HTTP status	500
Load time	0.190 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	0.228 s
Memory usage	2.68 MiB
JS errors	None
Resource errors	None

Benchmark

URL	Load time			Memory usage
URL	Inactive	Active	Change	Inactive	Active	Change
/	0.290 s	0.174 s	-0.116 s	2.65 MiB	2.68 MiB	+ 31.66 KiB
Average	0.290 s	0.174 s	-0.116 s	2.65 MiB	2.68 MiB	+ 31.66 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

SVG

Language		%	Lines of code	Comment lines	Files
	PHP	44.4%	3,737	1,108	39
	SVG	34.4%	2,898	1	3
	PO File	6.4%	539	286	1
	JavaScript	5.9%	499	21	3
	Sass	3.9%	325	0	2
	CSS	3.3%	275	14	2
	JSON	1.7%	140	0	1
Total			8,413	1,430	51

PHP Code Analysis | More results »

Lines of code	3,601
Total complexity	630
Median class complexity	7.0
Median method complexity	2.0
Most complex class	src\fortnox\api\WF_Orders
Most complex function	src\fortnox\api\WF_Customers::format_customer_payload()

Classes	36
Methods	200
Functions	5

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 128 lines

[31-May-2021 15:02:28 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function src\fortnox\WC() in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php:149
Stack trace:
#0 /wp-includes/class-wp-hook.php(292): src\fortnox\WF_Plugin::add_admin_scripts()
#1 /wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters()
#2 /wp-includes/plugin.php(484): WP_Hook->do_action()
#3 /wp-admin/admin-header.php(102): do_action()
#4 /wp-admin/plugins.php(603): require_once('/opt/bitnami/ap...')
#5 {main}
  thrown in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php on line 149
[31-May-2021 15:02:28 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function src\fortnox\WC() in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php:149
Stack trace:
#0 /wp-includes/class-wp-hook.php(292): src\fortnox\WF_Plugin::add_admin_scripts()
#1 /wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters()
#2 /wp-includes/plugin.php(484): WP_Hook->do_action()
#3 /wp-admin/admin-header.php(102): do_action()
#4 /wp-admin/index.php(115): require_once('/opt/bitnami/ap...')
#5 {main}
  thrown in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php on line 149
[31-May-2021 15:02:29 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function src\fortnox\WC() in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php:149
Stack trace:
#0 /wp-includes/class-wp-hook.php(292): src\fortnox\WF_Plugin::add_admin_scripts()
#1 /wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters()
#2 /wp-includes/plugin.php(484): WP_Hook->do_action()
#3 /wp-admin/admin-header.php(102): do_action()
#4 /wp-admin/index.php(115): require_once('/opt/bitnami/ap...')
#5 {main}
  thrown in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php on line 149
[31-May-2021 15:02:29 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function src\fortnox\WC() in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php:149
Stack trace:
#0 /wp-includes/class-wp-hook.php(292): src\fortnox\WF_Plugin::add_admin_scripts()
#1 /wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters()
#2 /wp-includes/plugin.php(484): WP_Hook->do_action()
#3 /wp-admin/admin-header.php(102): do_action()
#4 /wp-admin/edit.php(394): require_once('/opt/bitnami/ap...')
#5 {main}
  thrown in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php on line 149
[31-May-2021 15:02:29 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function src\fortnox\WC() in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php:149
Stack trace:
#0 /wp-includes/class-wp-hook.php(292): src\fortnox\WF_Plugin::add_admin_scripts()
#1 /wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters()
#2 /wp-includes/plugin.php(484): WP_Hook->do_action()
#3 /wp-admin/admin-header.php(102): do_action()
#4 /wp-admin/edit-form-blocks.php(450): require_once('/opt/bitnami/ap...')
#5 /wp-admin/post-new.php(72): require('/opt/bitnami/ap...')
#6 {main}
  thrown in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php on line 149
[31-May-2021 15:02:29 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function src\fortnox\WC() in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php:149
Stack trace:
#0 /wp-includes/class-wp-hook.php(292): src\fortnox\WF_Plugin::add_admin_scripts()
#1 /wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters()
#2 /wp-includes/plugin.php(484): WP_Hook->do_action()
#3 /wp-admin/admin-header.php(102): do_action()
#4 /wp-admin/upload.php(82): require_once('/opt/bitnami/ap...')
#5 {main}
  thrown in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php on line 149
[31-May-2021 15:02:29 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function src\fortnox\WC() in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php:149
Stack trace:
#0 /wp-includes/class-wp-hook.php(292): src\fortnox\WF_Plugin::add_admin_scripts()
#1 /wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters()
#2 /wp-includes/plugin.php(484): WP_Hook->do_action()
#3 /wp-admin/admin-header.php(102): do_action()
#4 /wp-admin/options-writing.php(56): require_once('/opt/bitnami/ap...')
#5 {main}
  thrown in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php on line 149
[31-May-2021 15:02:29 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function src\fortnox\WC() in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php:149
Stack trace:
#0 /wp-includes/class-wp-hook.php(292): src\fortnox\WF_Plugin::add_admin_scripts()
#1 /wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters()
#2 /wp-includes/plugin.php(484): WP_Hook->do_action()
#3 /wp-admin/admin-header.php(102): do_action()
#4 /wp-admin/media-new.php(64): require_once('/opt/bitnami/ap...')
#5 {main}
  thrown in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php on line 149
[31-May-2021 15:02:29 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function src\fortnox\WC() in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php:149
Stack trace:
#0 /wp-includes/class-wp-hook.php(292): src\fortnox\WF_Plugin::add_admin_scripts()
#1 /wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters()
#2 /wp-includes/plugin.php(484): WP_Hook->do_action()
#3 /wp-admin/admin-header.php(102): do_action()
#4 /wp-admin/edit-tags.php(321): require_once('/opt/bitnami/ap...')
#5 {main}
  thrown in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php on line 149
[31-May-2021 15:02:30 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function src\fortnox\WC() in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php:149
Stack trace:
#0 /wp-includes/class-wp-hook.php(292): src\fortnox\WF_Plugin::add_admin_scripts()
#1 /wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters()
#2 /wp-includes/plugin.php(484): WP_Hook->do_action()
#3 /wp-admin/admin-header.php(102): do_action()
#4 /wp-admin/edit-form-blocks.php(450): require_once('/opt/bitnami/ap...')
#5 /wp-admin/post-new.php(72): require('/opt/bitnami/ap...')
#6 {main}
  thrown in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php on line 149
[31-May-2021 15:02:30 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function src\fortnox\WC() in /wp-content/plugins/woocommerce-fortnox-integration/src/fortnox/class-wf-plugin.php:149
Stack trace:
#0 /wp-includes/class-wp-hook.php(292): src\fortnox\WF_Plugin::add_admin_scripts()
#1 /wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters()
#2 /wp-includes/plugin.php(484): WP_Hook->do_action()
#3 /wp-admin/admin-header.php(102): do_action()
#4 /wp-admin/options-discussion.php(35): require_once('/opt/bitnami/ap...')
#5 {main}

(+28 more lines)