Report - Recent Posts FlexSlider 2.4.1

Does Recent Posts FlexSlider work with WordPress 6.9.4 and PHP 8.1.12? A smoke test was performed on 2026-03-13 16:32:30 UTC.

Summary

Errors

1	PHP fatal errors
	No JavaScript exceptions
	All test pages loaded successfully
	No resource errors

Performance

Memory usage: 6.89 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	6.9.4
PHP version	8.1.12
MySQL version	10.6.10
PHP memory limit	512M

Plugin Info

Last updated	2021-07-11T11:17:00+00:00
Active installs	2,000+
WordPress.org page	https://wordpress.org/plugins/recent-posts-flexslider/
Badges	Get badge code

Pages 3

Plugins ‹ Test site — WordPress

URL	/wp-admin/plugins.php?plugin_status=all&paged=1&s
Requested URL	/wp-admin/plugins.php?action=activate&plugin=recent-posts-flexslider%2Frecent-posts-flexslider.php&plugin_status=all&paged=1&s&_wpnonce=f9094a9e22
Aspect	after-activation
HTTP status	200
Load time	0.342 s
Memory usage	3.74 MiB
JS errors	None
Resource errors	None

Test site – Just another WordPress site

URL	/
Aspect	front-page
HTTP status	200
Load time	0.179 s
Memory usage	4.12 MiB
JS errors	None
Resource errors	None

Widgets ‹ Test site — WordPress

URL	/wp-admin/widgets.php
Aspect	new-sidebar-widgets
HTTP status	200
Load time	1.032 s
Memory usage	6.16 MiB
JS errors	None
Resource errors	None

Benchmark

URL	Load time			Memory usage
URL	Inactive	Active	Change	Inactive	Active	Change
/wp-admin/index.php	0.426 s	0.332 s	-0.094 s	3.78 MiB	3.79 MiB	+ 12.39 KiB
/wp-admin/edit.php	0.361 s	0.275 s	-0.086 s	3.78 MiB	3.8 MiB	+ 12.39 KiB
/wp-admin/post-new.php	0.930 s	0.827 s	-0.103 s	6.31 MiB	6.32 MiB	+ 16.82 KiB
/wp-admin/upload.php	0.595 s	0.468 s	-0.127 s	3.74 MiB	3.73 MiB	- 5.02 KiB
/wp-admin/options-writing.php	0.330 s	0.275 s	-0.055 s	3.71 MiB	3.71 MiB	- 1.02 KiB
/wp-admin/media-new.php	0.488 s	0.309 s	-0.179 s	3.7 MiB	3.71 MiB	+ 7.17 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.307 s	0.279 s	-0.028 s	3.72 MiB	3.73 MiB	+ 17.84 KiB
/wp-admin/post-new.php?post_type=page	0.673 s	0.650 s	-0.023 s	6.3 MiB	6.31 MiB	+ 12.34 KiB
/wp-admin/options-discussion.php	0.355 s	0.379 s	+0.024 s	3.71 MiB	3.71 MiB	- 4.52 KiB
/wp-admin/edit-comments.php	0.322 s	0.343 s	+0.021 s	3.73 MiB	3.73 MiB	- 5.03 KiB
/	0.278 s	0.184 s	-0.094 s	4.11 MiB	4.12 MiB	+ 12.43 KiB
Average	0.460 s	0.393 s	-0.068 s	4.24 MiB	4.24 MiB	+ 6.89 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

Language		%	Lines of code	Comment lines	Files
	PHP	56.7%	389	88	3
	CSS	40.5%	278	22	1
	SVG	2.8%	19	0	1
Total			686	110	5

PHP Code Analysis | More results »

Lines of code	142
Total complexity	22
Median class complexity	21.0
Median method complexity	2.0
Most complex class	Recent_Posts_FlexSlider
Most complex function	Recent_Posts_FlexSlider::update()

Classes	1
Methods	9
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.

Options `wp_options` 1

widget_recent-posts-flexslider

Sidebar Widgets 1

ID	Name
recent-posts-flexslider	Recent Posts FlexSlider

PHP Error Log 8 lines

[13-Mar-2026 16:33:03 UTC] PHP Fatal error:  Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class Recent_Posts_FlexSlider does not have a method "deactivate" 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/plugin.php(826): do_action()
#3 /wp-admin/plugins.php(211): deactivate_plugins()
#4 {main}
  thrown in /wp-includes/class-wp-hook.php on line 341

Recent Posts FlexSlider 2.4.1