wpsnoop: fix cforms2 plugin conflicts, errors & issues

When the plugin cforms2 conflicts or throws a PHP error we hope wpsnoop can help you to fix the issue quickly.

Discover which shortcodes wp-options PHP functions database tables and files are created by cforms2, plus learn which plugins and/or themes could be in conflict with cforms2.

Troubleshooting theme and plugin conflicts is easier when you know what cforms2 leaves behind after uninstalling it from a WordPress installation, there is a list down below for your convenience.

Expert advice is recommended if you are not technically proficient with PHP, MySQL etc. View support options for cforms2

Get professional support for cforms2 here

When you need professional help with WordPress: get help here

What does cforms2 version 15.0.4 add to WordPress? Answers Here.

This is an automatically generated report - it is possible for cforms2 to perform differently in your installation, previous versions before 15.0.4 may have created a different set of shortcodes, used different function names or could have created entirely different database tables to store settings and operate. This is not an exhaustive list but shows how version 15.0.4 of cforms2 behaves when installed and removed on a clean installation of WordPress.

We have not tested individual shortcodes, features or settings of this plugin but instead have concentrated on the potential for obvious errors and conflicts which can occur, if you need help with the plugin in your local installation you can get WordPress help and support for cforms2 by clicking here.

Our testing covered the free version of this plugin there may or may not be a paid version or premium version available for purchase that unlocks additional features and could behave in a slightly or very different manner.

Summary of WordPress plugin analysis: cforms2

Plugin Slug: cforms2 Internal ID: 12862 Addon Type: Plugin Version: 15.0.4 Price: Free Source: WordPress.org Files: 71 (661.15kB) Short Codes: [ / ] 1 Database Tables: 0 Function Count: 47 Code Review: Search Provit

Do you need help with cforms2? Get professional plugin support here in no time at all

Which new files does cforms2 add to WordPress?

This section will populate with a table showing an icon, size and filepath.

The plugin cforms2 added 71 new files when it was installed with WP-CLI in our WordPress test environment.

Type & Path	Size	Conflicts
wp-content/plugins/cforms2/	661.15kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/cforms-admin.css	14.07kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/cforms-common.css	794.00B	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/cforms-corrupted.php	3.49kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/cforms-global-settings.php	19.25kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/cforms-help.php	51.00kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/cforms-options.php	63.99kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/cforms.php	3.79kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/Email.php	7.42kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/Fieldtypes/	26.51kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/Fieldtypes/captcha.php	2.19kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/Fieldtypes/CheckBox.php	2.08kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/Fieldtypes/CheckBoxGroup.php	2.49kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/Fieldtypes/FieldsetStart.php	1.36kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/Fieldtypes/Fieldtype.php	3.57kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/Fieldtypes/Html5.php	4.64kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/Fieldtypes/MultiId.php	1.32kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/Fieldtypes/QuestionAndAnswer.php	2.81kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/Fieldtypes/SelectBox.php	2.45kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/Fieldtypes/Text.php	2.12kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/Fieldtypes/TextOnly.php	1.47kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/FormSettings.php	4.85kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/images/	55.59kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/images/cformsicon.png	1.63kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/images/example-dropdown.png	7.01kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/images/example-fieldsets.png	26.63kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/images/example-grp.png	3.83kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/images/example-ms.png	5.76kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/images/example-multi.png	4.68kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/images/example-text.png	4.92kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/images/move.png	1.13kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/js/	42.30kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/js/cforms.admin.js	22.26kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/js/cforms.js	18.74kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/js/cforms.tinymce.js	1.30kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/lib_activate.php	9.96kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/lib_ajax.php	1.57kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/lib_aux.php	11.83kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/lib_editor.php	2.15kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/lib_functions.php	10.47kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/lib_options_sub.php	13.09kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/lib_render.php	36.92kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/lib_validate.php	32.55kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/license.txt	31.71kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/readme.txt	82.00kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/Settings.php	1.72kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/	129.66kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/cforms.css	6.47kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/cforms2012.css	7.17kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/dark_open_XL.css	6.51kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/fancy_blue.css	6.87kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/fancy_white_inp_bg.png	790.00B	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/fancy_white_submit.png	535.00B	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/fancy_white.css	6.71kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/grass_green.css	6.74kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/grey_blocks.css	6.63kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/icon-alert.png	559.00B	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/minimal.css	6.59kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/mono_space_dark.css	6.98kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/mono_space_light.css	6.98kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/right2left_style.css	6.78kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/shiny_style.css	7.00kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/sidebar-layout.css	6.55kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/sky_blue.css	6.68kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/wide_form.css	6.72kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/wide_open_big.css	6.54kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/wide_open_nb_blue.css	6.78kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/wide_open_nb_redish.css	6.75kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/styling/wide_open_no_border.css	6.39kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/uninstall.php	1.07kB	No known conflicts with other themes or plugins.
wp-content/plugins/cforms2/Widget.php	3.42kB	No known conflicts with other themes or plugins.

Which new shortcodes does cforms2 add to WordPress?

The plugin cforms2 added 1 new shortcode when it was installed with WP-CLI in our WordPress test environment.

ShortCode		Known Plugin or Theme conflicts
[cforms]		The cforms shortcode has potential conflict with at least 1 other plugin or theme.

Note: We have not yet checked to see if these shortcodes work as expected in pages, posts, sidebar widgets, or when set as the page title, in content, in the excert, in menus or anywhere else within a WordPress installation. A shortcode could produce errors due to parameters added when it is used, or if the plugin is updated and the format of the shortcode has changed.

Which new database tables are created by the WordPress plugin cforms2?

cforms2 did not create any new database tables when it was installed. It is possible that the plugin creates new database tables after an initial setup or configuration or after some period of use.

Which new options are added to the wp-options table by cforms2?

When cforms2 was activated and loaded for the first time it created 2 new options in the wp_options table. Any known conflicts will be shown in red.

Option Name		Known Conflicts
cforms_settings		Potential conflict with 1 plugin or theme
a:2:{s:6:"global";a:14:{s:20:"cforms_style_doctype";s:109:"<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">";s:1:"v";s:6:"15.0.4";s:12:"cforms_style";a:12:{s:4:"body";s:57:"style="margin:0; padding:0; font-size: 13px; color:#555;"";s:4:"meta";s:128:"style="font-size: 90%; margin:0; background:#aaaaaa; padding:1em 2em 1em 0.6em; color:#555555; border-bottom:1px solid #9d9d9d;"";s:5:"admin";s:54:"style="background:#f0f0f0; border-top:1px solid #777;"";s:5:"title";s:117:"style="font-size: 90%; margin:0; background:#fcfcfc; padding:1em 2em 1em 0.6em; color:#888888; display:inline-block;"";s:5:"table";s:59:"style="width:auto; margin: 0.2em 2em 2em; font-size: 100%;"";s:2:"fs";s:75:"style="color:#555; padding:1em 0 0.4em; font-size: 110%; font-weight:bold;"";s:6:"key_td";s:99:"style="padding: 0.3em 1em; border-bottom:1px dotted #ddd; padding-right:2em; color:#888; width:1%;"";s:6:"val_td";s:86:"style="padding: 0.3em 1em; border-bottom:1px dotted #ddd; padding-left:0; color:#333;"";s:8:"autoconf";s:58:"style="padding:1em 1em 0; background:#f0f0f0; color:#333;"";s:4:"dear";s:65:"style="margin:0.5em 30px; font-weight:bold; margin-bottom:1.2em;"";s:5:"confp";s:26:"style="margin:0.5em 30px;"";s:15:"confirmationmsg";s:73:"style="margin:4em 30px 0; padding-bottom:1em; font-size:80%; color:#aaa;"";}s:16:"cforms_inexclude";a:2:{s:2:"ex";s:0:"";s:3:"ids";s:0:"";}s:18:"cforms_upload_err1";s:43:"Generic file upload error. Please try again";s:18:"cforms_upload_err2";s:56:"File is empty. Please upload something more substantial.";s:18:"cforms_upload_err3";s:55:"Sorry, file is too large. You may try to zip your file.";s:18:"cforms_upload_err4";s:63:"File upload failed. Please try again or contact the blog admin.";s:18:"cforms_upload_err5";s:41:"File not accepted, file type not allowed.";s:18:"cforms_captcha_def";a:1:{s:4:"foqa";s:1:"0";}s:13:"cforms_sec_qa";s:82:"What color is snow?=white The color of grass is=green Ten minus five equals=five";s:14:"cforms_codeerr";s:43:"Please double-check your verification code.";s:20:"cforms_show_quicktag";s:1:"1";s:10:"cforms_css";s:14:"cforms2012.css";}s:4:"form";a:45:{s:17:"cforms_upload_ext";s:7:"txt,zip";s:18:"cforms_upload_size";s:4:"1024";s:16:"cforms_dontclear";b:0;s:19:"cforms_count_fields";s:1:"5";s:20:"cforms_count_field_1";s:47:"My Fieldset$#$fieldsetstart$#$0$#$0$#$0$#$0$#$0";s:20:"cforms_count_field_2";s:51:"Your Name\|Your Name$#$textfield$#$1$#$0$#$1$#$0$#$0";s:20:"cforms_count_field_3";s:37:"Email$#$textfield$#$1$#$1$#$0$#$0$#$0";s:20:"cforms_count_field_4";s:47:"Website\|http://$#$textfield$#$0$#$0$#$0$#$0$#$0";s:20:"cforms_count_field_5";s:38:"Message$#$textarea$#$0$#$0$#$0$#$0$#$0";s:15:"cforms_required";s:10:"(required)";s:20:"cforms_emailrequired";s:22:"(valid email required)";s:14:"cforms_confirm";s:1:"0";s:11:"cforms_ajax";s:1:"1";s:12:"cforms_fname";s:17:"Your default form";s:15:"cforms_csubject";s:41:"Re: Your note$#$Re: Submitted form (copy)";s:11:"cforms_cmsg";s:89:"Dear {Your Name}, Thank you for your note! We will get back to you as soon as possible. ";s:16:"cforms_cmsg_html";s:432:"<div style="padding:1em 1em 0; background:#f0f0f0; color:#333;"><p style="margin:0.5em 30px; font-weight:bold; margin-bottom:1.2em;">Dear {Your Name},</p> <p style="margin:0.5em 30px;">Thank you for your note!</p> <p style="margin:0.5em 30px;">We will get back to you as soon as possible. <div style="margin:4em 30px 0; padding-bottom:1em; font-size:80%; color:#aaa;">This is an automatic confirmation message. {Date}.</div></div> ";s:15:"cforms_emailoff";s:1:"0";s:15:"cforms_emptyoff";s:1:"0";s:18:"cforms_tellafriend";s:1:"0";s:18:"cforms_customnames";b:0;s:16:"cforms_startdate";s:1:" ";s:14:"cforms_enddate";s:1:" ";s:17:"cforms_formaction";b:0;s:12:"cforms_email";s:26:"evileric+wpsnoop@gmail.com";s:16:"cforms_fromemail";s:26:"evileric+wpsnoop@gmail.com";s:10:"cforms_bcc";s:0:"";s:13:"cforms_header";s:147:"A new submission (form: "{Form Name}") ============================================ Submitted on: {Date} Via: {Page} By {IP} (visitor IP). . ";s:18:"cforms_header_html";s:194:"<p style="font-size: 90%; margin:0; background:#aaaaaa; padding:1em 2em 1em 0.6em; color:#555555; border-bottom:1px solid #9d9d9d;">A form has been submitted on {Date}, via: {Page} [IP {IP}]</p>";s:15:"cforms_formdata";s:4:"1111";s:12:"cforms_space";s:2:"30";s:20:"cforms_noattachments";s:1:"0";s:14:"cforms_subject";s:26:"A comment from {Your Name}";s:18:"cforms_submit_text";s:6:"Submit";s:14:"cforms_success";s:27:"Thank you for your comment!";s:14:"cforms_failure";s:39:"Please fill in all the required fields.";s:15:"cforms_limittxt";s:59:"<strong>No more submissions accepted at this time.</strong>";s:14:"cforms_working";s:20:"One moment please...";s:14:"cforms_showpos";s:4:"ynyy";s:11:"cforms_hide";b:0;s:15:"cforms_redirect";b:0;s:20:"cforms_redirect_page";s:0:"";s:13:"cforms_action";b:0;s:18:"cforms_action_page";s:0:"";s:9:"cforms_mp";a:7:{s:7:"mp_form";b:0;s:7:"mp_next";s:0:"";s:8:"mp_first";b:0;s:8:"mp_reset";b:0;s:12:"mp_resettext";s:0:"";s:7:"mp_back";b:0;s:11:"mp_backtext";s:0:"";}}}
widget_cforms		The widget_cforms option doesn't have any known conflicts with other themes or plugins.
a:1:{s:12:"_multiwidget";i:1;}

During use cforms2 may or may not create more options depending on how the plugin is configured and depending on which other themes and plugins are active in your specific hosting environment.

After disabling and deleting cforms2 there were 2 options still present in the wp-options table:

recently_activated
widget_cforms

Contact cforms2 experts for help

What new PHP functions does cforms2 declare when it is active?

Installing cforms2 added 47 new function to Wordpress at run-time. These functions are internal and generally aren't meant to be used except by developpers who wish to interface with the plugin to enhance or alter its behavior.

Function	Conflicts	Common Errors
cforms2	0 conflicts	Fatal error: Cannot redeclare cforms2()
cforms2_add_admin_bar_item	0 conflicts	Fatal error: Cannot redeclare cforms2_add_admin_bar_item()
cforms2_add_admin_bar_root	0 conflicts	Fatal error: Cannot redeclare cforms2_add_admin_bar_root()
cforms2_add_file	0 conflicts	Fatal error: Cannot redeclare cforms2_add_file()
cforms2_add_items_global	0 conflicts	Fatal error: Cannot redeclare cforms2_add_items_global()
cforms2_add_items_options	0 conflicts	Fatal error: Cannot redeclare cforms2_add_items_options()
cforms2_admin_date_format	0 conflicts	Fatal error: Cannot redeclare cforms2_admin_date_format()
cforms2_admin_enqueue_scripts	0 conflicts	Fatal error: Cannot redeclare cforms2_admin_enqueue_scripts()
cforms2_all_tracks	0 conflicts	Fatal error: Cannot redeclare cforms2_all_tracks()
cforms2_build_fstat	0 conflicts	Fatal error: Cannot redeclare cforms2_build_fstat()
cforms2_check_access_priv	0 conflicts	Fatal error: Cannot redeclare cforms2_check_access_priv()
cforms2_check_cust_vars	0 conflicts	Fatal error: Cannot redeclare cforms2_check_cust_vars()
cforms2_check_default_vars	0 conflicts	Fatal error: Cannot redeclare cforms2_check_default_vars()
cforms2_check_erased	0 conflicts	Fatal error: Cannot redeclare cforms2_check_erased()
cforms2_check_form_name	0 conflicts	Fatal error: Cannot redeclare cforms2_check_form_name()
cforms2_check_pluggable_captchas_authn_users	0 conflicts	Fatal error: Cannot redeclare cforms2_check_pluggable_captchas_authn_users()
cforms2_check_post_vars	0 conflicts	Fatal error: Cannot redeclare cforms2_check_post_vars()
cforms2_check_time	0 conflicts	Fatal error: Cannot redeclare cforms2_check_time()
cforms2_delete_db_and_deactivate	0 conflicts	Fatal error: Cannot redeclare cforms2_delete_db_and_deactivate()
cforms2_enqueue_scripts	0 conflicts	Fatal error: Cannot redeclare cforms2_enqueue_scripts()
cforms2_enqueue_style_admin	0 conflicts	Fatal error: Cannot redeclare cforms2_enqueue_style_admin()
cforms2_field	0 conflicts	Fatal error: Cannot redeclare cforms2_field()
cforms2_format_email	0 conflicts	Fatal error: Cannot redeclare cforms2_format_email()
cforms2_get_boolean_from_request	0 conflicts	Fatal error: Cannot redeclare cforms2_get_boolean_from_request()
cforms2_get_current_page	0 conflicts	Fatal error: Cannot redeclare cforms2_get_current_page()
cforms2_get_fieldtypes	0 conflicts	Fatal error: Cannot redeclare cforms2_get_fieldtypes()
cforms2_get_from_request	0 conflicts	Fatal error: Cannot redeclare cforms2_get_from_request()
cforms2_get_ip	0 conflicts	Fatal error: Cannot redeclare cforms2_get_ip()
cforms2_get_pluggable_captchas	0 conflicts	Fatal error: Cannot redeclare cforms2_get_pluggable_captchas()
cforms2_get_request_uri	0 conflicts	Fatal error: Cannot redeclare cforms2_get_request_uri()
cforms2_get_the_id	0 conflicts	Fatal error: Cannot redeclare cforms2_get_the_id()
cforms2_insert_modal	0 conflicts	Fatal error: Cannot redeclare cforms2_insert_modal()
cforms2_is_email	0 conflicts	Fatal error: Cannot redeclare cforms2_is_email()
cforms2_json_die	0 conflicts	Fatal error: Cannot redeclare cforms2_json_die()
cforms2_menu	0 conflicts	Fatal error: Cannot redeclare cforms2_menu()
cforms2_move_files	0 conflicts	Fatal error: Cannot redeclare cforms2_move_files()
cforms2_prep	0 conflicts	Fatal error: Cannot redeclare cforms2_prep()
cforms2_sanitize_ids	0 conflicts	Fatal error: Cannot redeclare cforms2_sanitize_ids()
cforms2_set_ini	0 conflicts	Fatal error: Cannot redeclare cforms2_set_ini()
cforms2_settings_corrupted	0 conflicts	Fatal error: Cannot redeclare cforms2_settings_corrupted()
cforms2_setup_db	0 conflicts	Fatal error: Cannot redeclare cforms2_setup_db()
cforms2_shortcode	0 conflicts	Fatal error: Cannot redeclare cforms2_shortcode()
cforms2_start_session	0 conflicts	Fatal error: Cannot redeclare cforms2_start_session()
cforms2_submitcform	0 conflicts	Fatal error: Cannot redeclare cforms2_submitcform()
cforms2_validate	0 conflicts	Fatal error: Cannot redeclare cforms2_validate()
cforms2_wp_mail_failed	0 conflicts	Fatal error: Cannot redeclare cforms2_wp_mail_failed()
insert_cform	0 conflicts	Fatal error: Cannot redeclare insert_cform()

Using cforms2 from the command line with WP-CLI

The following commands are provided for convenience and should only be used if you understand how WP-CLI works. These commands refer to a single WordPress instance and may need to be modified if you are working with a Multisite installation.

How to install cforms2 from the command line with WP-CLI

Navigate to the root of your WordPress installation and type the following command:

wp plugin install cforms2

How to activate cforms2 from the command line with WP-CLI

To immediately activate cforms2 after WP-CLI downloads the latest version you can use the following command:

wp plugin install cforms2 --activate

How to reinstall cforms2 from the command line with WP-CLI

To force a reinstallation of cforms2 which overwrites the current plugin without asking for confirmation you can use the following command:

wp plugin install cforms2 --force

How to update cforms2 to the latest version from the command line with WP-CLI

wp plugin update cforms2

How to delete cforms2 from the command line with WP-CLI

wp plugin delete cforms2

Where can you download earlier versions of cforms2?

Whenever possible you should use the latest version of plugins and themes, however if you have recently updated and discovered that you need to install an earlier version you may be able to download other versions of cforms2 from the WordPress repository by visiting this link.

Please note that installing earlier versions of a theme or plugin is not generally a recommended course of action for most users and could re-introduce security, stability or other issues in cforms2

About our testing enviroment

Tests were conducted using Apache 2.4.29, PHP 7.2 on Ubuntu 18.04, MySQL 5.7.33 and WordPress 5.9

It is very possible that different versions of PHP such as PHP 8.0, PHP 7.4, or PHP 7.3 could behave differently with cforms2. Different versions of WordPress could implement the features of this plugin in slightly different ways as well.