wpsnoop: fix Contact Form 7 plugin conflicts, errors & issues

When the plugin Contact Form 7 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 Contact Form 7, plus learn which plugins and/or themes could be in conflict with Contact Form 7.

Troubleshooting theme and plugin conflicts is easier when you know what Contact Form 7 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 Contact Form 7

Database Issues

0
ShortCode Issues

14
Function Issues

79
File System Issues

3
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What does Contact Form 7 version 5.5.4 add to WordPress? Answers Here.

This is an automatically generated report - it is possible for Contact Form 7 to perform differently in your installation, previous versions before 5.5.4 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 5.5.4 of Contact Form 7 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 Contact Form 7 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: Contact Form 7

Plugin Slug: contact-form-7 Internal ID: 15405 Addon Type: Plugin Version: 5.5.4 Price: Free Source: WordPress.org Files: 121 (664.37kB) Short Codes: [ / ] 2 Database Tables: 0 Function Count: 248 Code Review: Search Provit
Do you need help with Contact Form 7? Get professional plugin support here in no time at all

Which new files does Contact Form 7 add to WordPress?

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

Type & Path Size Conflicts
wp-content/uploads/ 14.00B The wp-content/uploads/ directory has potential conflicts with at least 1495 other plugins or themes.
wp-content/plugins/contact-form-7/ 664.35kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/ 85.86kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/admin.php 16.91kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/css/ 9.58kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/css/styles-rtl.css 1.06kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/css/styles.css 8.52kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/edit-contact-form.php 9.39kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/includes/ 35.98kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/includes/admin-functions.php 580.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/includes/class-contact-forms-list-table.php 5.71kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/includes/config-validator.php 3.33kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/includes/editor.php 9.10kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/includes/help-tabs.php 6.81kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/includes/tag-generator.php 1.79kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/includes/welcome-panel.php 8.69kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/js/ 14.01kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/js/scripts.js 8.13kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/admin/js/tag-generator.js 5.87kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/assets/ 30.61kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/assets/icon.png 29.11kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/assets/icon.svg 1.50kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/ 322.04kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/block-editor/ 5.14kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/block-editor/block-editor.php 920.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/block-editor/index.js 4.25kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/capabilities.php 834.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/config-validator.php 19.48kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/contact-form-functions.php 6.60kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/contact-form-template.php 5.44kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/contact-form.php 28.37kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/controller.php 3.08kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/css/ 2.82kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/css/styles-rtl.css 152.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/css/styles.css 2.67kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/file.php 9.03kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/form-tag.php 8.66kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/form-tags-manager.php 8.72kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/formatting.php 13.73kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/functions.php 15.21kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/integration.php 7.31kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/ 125.65kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/html5-fallback.js 643.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/index.js 9.49kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/ 115.53kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/ 115.53kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/ 115.53kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/images/ 31.83kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/images/ui-bg_glass_55_fbf9ee_1x400.png 393.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/images/ui-bg_glass_65_ffffff_1x400.png 265.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/images/ui-bg_glass_75_dadada_1x400.png 323.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/images/ui-bg_glass_75_e6e6e6_1x400.png 324.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/images/ui-bg_glass_95_fef1ec_1x400.png 390.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/images/ui-bg_highlight-soft_75_cccccc_1x100.png 325.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/images/ui-icons_222222_256x240.png 6.86kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/images/ui-icons_2e83ff_256x240.png 4.57kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/images/ui-icons_454545_256x240.png 6.92kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/images/ui-icons_888888_256x240.png 6.94kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/images/ui-icons_cd0a0a_256x240.png 4.57kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/jquery-ui.css 35.68kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/jquery-ui.min.css 30.55kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/js/jquery-ui/themes/smoothness/theme.css 17.46kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/l10n.php 2.08kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/mail.php 12.06kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/pipe.php 1.87kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/rest-api.php 11.50kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/shortcodes.php 2.63kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/special-mail-tags.php 6.05kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/submission.php 17.63kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/upgrade.php 2.05kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/validation-functions.php 4.33kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/includes/validation.php 1.77kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/languages/ 128.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/languages/readme.txt 128.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/license.txt 18.70kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/load.php 5.33kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/ 194.84kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/acceptance.php 7.67kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/akismet.php 3.32kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/checkbox.php 9.38kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/constant-contact/ 29.98kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/constant-contact/constant-contact.php 2.62kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/constant-contact/contact-form-properties.php 6.12kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/constant-contact/contact-post-request.php 8.29kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/constant-contact/doi.php 2.15kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/constant-contact/service.php 10.81kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/count.php 1.46kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/date.php 7.77kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/disallowed-list.php 1.77kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/doi-helper.php 879.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/file.php 6.13kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/flamingo.php 8.15kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/hidden.php 776.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/listo.php 696.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/number.php 8.23kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/quiz.php 7.23kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/really-simple-captcha.php 16.77kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/recaptcha/ 13.79kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/recaptcha/index.js 999.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/recaptcha/recaptcha.php 12.82kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/response.php 460.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/select.php 7.28kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/sendinblue/ 22.78kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/sendinblue/contact-form-properties.php 6.82kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/sendinblue/doi.php 2.28kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/sendinblue/sendinblue.php 4.47kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/sendinblue/service.php 9.22kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/stripe/ 19.93kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/stripe/api.php 3.42kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/stripe/index.js 3.50kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/stripe/service.php 5.94kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/stripe/stripe.php 6.76kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/stripe/style.css 315.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/submit.php 2.87kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/text.php 10.94kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/modules/textarea.php 6.65kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/readme.txt 4.62kB No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/uninstall.php 503.00B No known conflicts with other themes or plugins.
wp-content/plugins/contact-form-7/wp-contact-form-7.php 1.75kB No known conflicts with other themes or plugins.
wp-content/uploads/wpcf7_uploads/ 14.00B No known conflicts with other themes or plugins.
wp-content/uploads/wpcf7_uploads/.htaccess 14.00B No known conflicts with other themes or plugins.

Which new shortcodes does Contact Form 7 add to WordPress?

ShortCode   Known Plugin or Theme conflicts
[contact-form] The contact-form shortcode has potential conflicts with at least 13 other plugins or themes.
[contact-form-7] The contact-form-7 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 Contact Form 7?

Which new options are added to the wp-options table by Contact Form 7?

Option Name   Known Conflicts
wpcf7 Potential conflict with 1 plugin or theme

During use Contact Form 7 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.

What new PHP functions does Contact Form 7 declare when it is active?

Function   Conflicts Common Errors
wpcf7 1 conflict Fatal error: Cannot redeclare wpcf7()
wpcf7_acceptance_as_validation 1 conflict Fatal error: Cannot redeclare wpcf7_acceptance_as_validation()
wpcf7_acceptance_filter 1 conflict Fatal error: Cannot redeclare wpcf7_acceptance_filter()
wpcf7_acceptance_form_class_attr 1 conflict Fatal error: Cannot redeclare wpcf7_acceptance_form_class_attr()
wpcf7_acceptance_validation_filter 1 conflict Fatal error: Cannot redeclare wpcf7_acceptance_validation_filter()
wpcf7_add_shortcode 1 conflict Fatal error: Cannot redeclare wpcf7_add_shortcode()
wpcf7_add_tag_generator_acceptance 1 conflict Fatal error: Cannot redeclare wpcf7_add_tag_generator_acceptance()
wpcf7_add_tag_generator_captcha 1 conflict Fatal error: Cannot redeclare wpcf7_add_tag_generator_captcha()
wpcf7_add_tag_generator_checkbox_and_radio 1 conflict Fatal error: Cannot redeclare wpcf7_add_tag_generator_checkbox_and_radio()
wpcf7_add_tag_generator_file 1 conflict Fatal error: Cannot redeclare wpcf7_add_tag_generator_file()
wpcf7_add_tag_generator_menu 1 conflict Fatal error: Cannot redeclare wpcf7_add_tag_generator_menu()
wpcf7_add_tag_generator_quiz 1 conflict Fatal error: Cannot redeclare wpcf7_add_tag_generator_quiz()
wpcf7_add_tag_generator_submit 1 conflict Fatal error: Cannot redeclare wpcf7_add_tag_generator_submit()
wpcf7_add_tag_generator_textarea 1 conflict Fatal error: Cannot redeclare wpcf7_add_tag_generator_textarea()
wpcf7_akismet 1 conflict Fatal error: Cannot redeclare wpcf7_akismet()
wpcf7_autop 1 conflict Fatal error: Cannot redeclare wpcf7_autop()
wpcf7_canonicalize 1 conflict Fatal error: Cannot redeclare wpcf7_canonicalize()
wpcf7_captcha_ajax_refill 1 conflict Fatal error: Cannot redeclare wpcf7_captcha_ajax_refill()
wpcf7_captcha_display_warning_message 1 conflict Fatal error: Cannot redeclare wpcf7_captcha_display_warning_message()
wpcf7_captcha_messages 1 conflict Fatal error: Cannot redeclare wpcf7_captcha_messages()
wpcf7_captcha_tmp_dir 1 conflict Fatal error: Cannot redeclare wpcf7_captcha_tmp_dir()
wpcf7_captcha_tmp_url 1 conflict Fatal error: Cannot redeclare wpcf7_captcha_tmp_url()
wpcf7_captcha_validation_filter 1 conflict Fatal error: Cannot redeclare wpcf7_captcha_validation_filter()
wpcf7_captchac_options 1 conflict Fatal error: Cannot redeclare wpcf7_captchac_options()
wpcf7_check_captcha 1 conflict Fatal error: Cannot redeclare wpcf7_check_captcha()
wpcf7_checkbox_validation_filter 1 conflict Fatal error: Cannot redeclare wpcf7_checkbox_validation_filter()
wpcf7_cleanup_captcha_files 1 conflict Fatal error: Cannot redeclare wpcf7_cleanup_captcha_files()
wpcf7_cleanup_upload_files 1 conflict Fatal error: Cannot redeclare wpcf7_cleanup_upload_files()
wpcf7_contact_form 1 conflict Fatal error: Cannot redeclare wpcf7_contact_form()
wpcf7_contact_form_tag_func 1 conflict Fatal error: Cannot redeclare wpcf7_contact_form_tag_func()
wpcf7_convert_to_cpt 1 conflict Fatal error: Cannot redeclare wpcf7_convert_to_cpt()
wpcf7_create_nonce 1 conflict Fatal error: Cannot redeclare wpcf7_create_nonce()
wpcf7_do_shortcode 1 conflict Fatal error: Cannot redeclare wpcf7_do_shortcode()
wpcf7_enqueue_scripts 1 conflict Fatal error: Cannot redeclare wpcf7_enqueue_scripts()
wpcf7_enqueue_styles 1 conflict Fatal error: Cannot redeclare wpcf7_enqueue_styles()
wpcf7_file_display_warning_message 1 conflict Fatal error: Cannot redeclare wpcf7_file_display_warning_message()
wpcf7_file_form_enctype_filter 1 conflict Fatal error: Cannot redeclare wpcf7_file_form_enctype_filter()
wpcf7_file_messages 1 conflict Fatal error: Cannot redeclare wpcf7_file_messages()
wpcf7_file_validation_filter 1 conflict Fatal error: Cannot redeclare wpcf7_file_validation_filter()
wpcf7_form_controls_class 1 conflict Fatal error: Cannot redeclare wpcf7_form_controls_class()
wpcf7_generate_captcha 1 conflict Fatal error: Cannot redeclare wpcf7_generate_captcha()
wpcf7_get_contact_form_by_old_id 1 conflict Fatal error: Cannot redeclare wpcf7_get_contact_form_by_old_id()
wpcf7_get_contact_form_by_title 1 conflict Fatal error: Cannot redeclare wpcf7_get_contact_form_by_title()
wpcf7_get_current_contact_form 1 conflict Fatal error: Cannot redeclare wpcf7_get_current_contact_form()
wpcf7_get_message 1 conflict Fatal error: Cannot redeclare wpcf7_get_message()
wpcf7_get_request_uri 1 conflict Fatal error: Cannot redeclare wpcf7_get_request_uri()
wpcf7_get_validation_error 1 conflict Fatal error: Cannot redeclare wpcf7_get_validation_error()
wpcf7_init_captcha 1 conflict Fatal error: Cannot redeclare wpcf7_init_captcha()
wpcf7_init_uploads 1 conflict Fatal error: Cannot redeclare wpcf7_init_uploads()
wpcf7_install 1 conflict Fatal error: Cannot redeclare wpcf7_install()
wpcf7_is_name 1 conflict Fatal error: Cannot redeclare wpcf7_is_name()
wpcf7_is_posted 1 conflict Fatal error: Cannot redeclare wpcf7_is_posted()
wpcf7_is_rtl 1 conflict Fatal error: Cannot redeclare wpcf7_is_rtl()
wpcf7_l10n 1 conflict Fatal error: Cannot redeclare wpcf7_l10n()
wpcf7_messages 1 conflict Fatal error: Cannot redeclare wpcf7_messages()
wpcf7_normalize_newline 1 conflict Fatal error: Cannot redeclare wpcf7_normalize_newline()
wpcf7_normalize_newline_deep 1 conflict Fatal error: Cannot redeclare wpcf7_normalize_newline_deep()
wpcf7_plugin_path 1 conflict Fatal error: Cannot redeclare wpcf7_plugin_path()
wpcf7_plugin_url 1 conflict Fatal error: Cannot redeclare wpcf7_plugin_url()
wpcf7_quiz_ajax_refill 1 conflict Fatal error: Cannot redeclare wpcf7_quiz_ajax_refill()
wpcf7_quiz_messages 1 conflict Fatal error: Cannot redeclare wpcf7_quiz_messages()
wpcf7_quiz_validation_filter 1 conflict Fatal error: Cannot redeclare wpcf7_quiz_validation_filter()
wpcf7_register_post_types 1 conflict Fatal error: Cannot redeclare wpcf7_register_post_types()
wpcf7_remove_captcha 1 conflict Fatal error: Cannot redeclare wpcf7_remove_captcha()
wpcf7_remove_shortcode 1 conflict Fatal error: Cannot redeclare wpcf7_remove_shortcode()
wpcf7_sanitize_unit_tag 1 conflict Fatal error: Cannot redeclare wpcf7_sanitize_unit_tag()
wpcf7_scan_shortcode 1 conflict Fatal error: Cannot redeclare wpcf7_scan_shortcode()
wpcf7_script_is 1 conflict Fatal error: Cannot redeclare wpcf7_script_is()
wpcf7_select_validation_filter 1 conflict Fatal error: Cannot redeclare wpcf7_select_validation_filter()
wpcf7_special_mail_tag 1 conflict Fatal error: Cannot redeclare wpcf7_special_mail_tag()
wpcf7_strip_quote 1 conflict Fatal error: Cannot redeclare wpcf7_strip_quote()
wpcf7_strip_quote_deep 1 conflict Fatal error: Cannot redeclare wpcf7_strip_quote_deep()
wpcf7_style_is 1 conflict Fatal error: Cannot redeclare wpcf7_style_is()
wpcf7_text_validation_filter 1 conflict Fatal error: Cannot redeclare wpcf7_text_validation_filter()
wpcf7_textarea_validation_filter 1 conflict Fatal error: Cannot redeclare wpcf7_textarea_validation_filter()
wpcf7_upgrade 1 conflict Fatal error: Cannot redeclare wpcf7_upgrade()
wpcf7_upload_dir 1 conflict Fatal error: Cannot redeclare wpcf7_upload_dir()
wpcf7_upload_tmp_dir 1 conflict Fatal error: Cannot redeclare wpcf7_upload_tmp_dir()
wpcf7_verify_nonce 1 conflict Fatal error: Cannot redeclare wpcf7_verify_nonce()
wpcf7_acceptable_filetypes 0 conflicts Fatal error: Cannot redeclare wpcf7_acceptable_filetypes()
wpcf7_acceptance_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_acceptance_form_tag_handler()
wpcf7_acceptance_mail_tag 0 conflicts Fatal error: Cannot redeclare wpcf7_acceptance_mail_tag()
wpcf7_add_form_tag 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag()
wpcf7_add_form_tag_acceptance 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag_acceptance()
wpcf7_add_form_tag_captcha 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag_captcha()
wpcf7_add_form_tag_checkbox 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag_checkbox()
wpcf7_add_form_tag_count 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag_count()
wpcf7_add_form_tag_date 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag_date()
wpcf7_add_form_tag_file 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag_file()
wpcf7_add_form_tag_hidden 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag_hidden()
wpcf7_add_form_tag_number 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag_number()
wpcf7_add_form_tag_quiz 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag_quiz()
wpcf7_add_form_tag_response 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag_response()
wpcf7_add_form_tag_select 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag_select()
wpcf7_add_form_tag_stripe 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag_stripe()
wpcf7_add_form_tag_submit 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag_submit()
wpcf7_add_form_tag_text 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag_text()
wpcf7_add_form_tag_textarea 0 conflicts Fatal error: Cannot redeclare wpcf7_add_form_tag_textarea()
wpcf7_add_tag_generator_date 0 conflicts Fatal error: Cannot redeclare wpcf7_add_tag_generator_date()
wpcf7_add_tag_generator_number 0 conflicts Fatal error: Cannot redeclare wpcf7_add_tag_generator_number()
wpcf7_add_tag_generator_text 0 conflicts Fatal error: Cannot redeclare wpcf7_add_tag_generator_text()
wpcf7_admin_init_recaptcha_v2_v3 0 conflicts Fatal error: Cannot redeclare wpcf7_admin_init_recaptcha_v2_v3()
wpcf7_admin_menu_change_notice_recaptcha_v2_v3 0 conflicts Fatal error: Cannot redeclare wpcf7_admin_menu_change_notice_recaptcha_v2_v3()
wpcf7_admin_warnings_recaptcha_v2_v3 0 conflicts Fatal error: Cannot redeclare wpcf7_admin_warnings_recaptcha_v2_v3()
wpcf7_akismet_comment_check 0 conflicts Fatal error: Cannot redeclare wpcf7_akismet_comment_check()
wpcf7_akismet_is_available 0 conflicts Fatal error: Cannot redeclare wpcf7_akismet_is_available()
wpcf7_akismet_submitted_params 0 conflicts Fatal error: Cannot redeclare wpcf7_akismet_submitted_params()
wpcf7_anonymize_ip_addr 0 conflicts Fatal error: Cannot redeclare wpcf7_anonymize_ip_addr()
wpcf7_antiscript_file_name 0 conflicts Fatal error: Cannot redeclare wpcf7_antiscript_file_name()
wpcf7_apply_filters_deprecated 0 conflicts Fatal error: Cannot redeclare wpcf7_apply_filters_deprecated()
wpcf7_array_flatten 0 conflicts Fatal error: Cannot redeclare wpcf7_array_flatten()
wpcf7_autop_or_not 0 conflicts Fatal error: Cannot redeclare wpcf7_autop_or_not()
wpcf7_autop_preserve_newline_callback 0 conflicts Fatal error: Cannot redeclare wpcf7_autop_preserve_newline_callback()
wpcf7_blacklist_check 0 conflicts Fatal error: Cannot redeclare wpcf7_blacklist_check()
wpcf7_build_query 0 conflicts Fatal error: Cannot redeclare wpcf7_build_query()
wpcf7_captcha_url 0 conflicts Fatal error: Cannot redeclare wpcf7_captcha_url()
wpcf7_captchac_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_captchac_form_tag_handler()
wpcf7_captchar_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_captchar_form_tag_handler()
wpcf7_check_disallowed_list 0 conflicts Fatal error: Cannot redeclare wpcf7_check_disallowed_list()
wpcf7_checkbox_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_checkbox_form_tag_handler()
wpcf7_constant_contact_doi_default_email_callback 0 conflicts Fatal error: Cannot redeclare wpcf7_constant_contact_doi_default_email_callback()
wpcf7_constant_contact_doi_default_optin_callback 0 conflicts Fatal error: Cannot redeclare wpcf7_constant_contact_doi_default_optin_callback()
wpcf7_constant_contact_doi_register_agent 0 conflicts Fatal error: Cannot redeclare wpcf7_constant_contact_doi_register_agent()
wpcf7_constant_contact_editor_panels 0 conflicts Fatal error: Cannot redeclare wpcf7_constant_contact_editor_panels()
wpcf7_constant_contact_register_property 0 conflicts Fatal error: Cannot redeclare wpcf7_constant_contact_register_property()
wpcf7_constant_contact_register_service 0 conflicts Fatal error: Cannot redeclare wpcf7_constant_contact_register_service()
wpcf7_constant_contact_save_contact_form 0 conflicts Fatal error: Cannot redeclare wpcf7_constant_contact_save_contact_form()
wpcf7_constant_contact_setup_property 0 conflicts Fatal error: Cannot redeclare wpcf7_constant_contact_setup_property()
wpcf7_constant_contact_submit 0 conflicts Fatal error: Cannot redeclare wpcf7_constant_contact_submit()
wpcf7_control_init 0 conflicts Fatal error: Cannot redeclare wpcf7_control_init()
wpcf7_count_code_units 0 conflicts Fatal error: Cannot redeclare wpcf7_count_code_units()
wpcf7_count_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_count_form_tag_handler()
wpcf7_date_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_date_form_tag_handler()
wpcf7_date_messages 0 conflicts Fatal error: Cannot redeclare wpcf7_date_messages()
wpcf7_date_validation_filter 0 conflicts Fatal error: Cannot redeclare wpcf7_date_validation_filter()
wpcf7_deprecated_function 0 conflicts Fatal error: Cannot redeclare wpcf7_deprecated_function()
wpcf7_disallowed_list 0 conflicts Fatal error: Cannot redeclare wpcf7_disallowed_list()
wpcf7_doihelper_start_session 0 conflicts Fatal error: Cannot redeclare wpcf7_doihelper_start_session()
wpcf7_doing_it_wrong 0 conflicts Fatal error: Cannot redeclare wpcf7_doing_it_wrong()
wpcf7_enctype_value 0 conflicts Fatal error: Cannot redeclare wpcf7_enctype_value()
wpcf7_file_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_file_form_tag_handler()
wpcf7_file_mail_tag 0 conflicts Fatal error: Cannot redeclare wpcf7_file_mail_tag()
wpcf7_flamingo_add_channel 0 conflicts Fatal error: Cannot redeclare wpcf7_flamingo_add_channel()
wpcf7_flamingo_get_value 0 conflicts Fatal error: Cannot redeclare wpcf7_flamingo_get_value()
wpcf7_flamingo_serial_number 0 conflicts Fatal error: Cannot redeclare wpcf7_flamingo_serial_number()
wpcf7_flamingo_submit 0 conflicts Fatal error: Cannot redeclare wpcf7_flamingo_submit()
wpcf7_flamingo_update_channel 0 conflicts Fatal error: Cannot redeclare wpcf7_flamingo_update_channel()
wpcf7_flat_join 0 conflicts Fatal error: Cannot redeclare wpcf7_flat_join()
wpcf7_form_tag_supports 0 conflicts Fatal error: Cannot redeclare wpcf7_form_tag_supports()
wpcf7_format_atts 0 conflicts Fatal error: Cannot redeclare wpcf7_format_atts()
wpcf7_get_hangover 0 conflicts Fatal error: Cannot redeclare wpcf7_get_hangover()
wpcf7_get_validation_error_reference 0 conflicts Fatal error: Cannot redeclare wpcf7_get_validation_error_reference()
wpcf7_hidden_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_hidden_form_tag_handler()
wpcf7_html5_fallback 0 conflicts Fatal error: Cannot redeclare wpcf7_html5_fallback()
wpcf7_include_module_file 0 conflicts Fatal error: Cannot redeclare wpcf7_include_module_file()
wpcf7_init 0 conflicts Fatal error: Cannot redeclare wpcf7_init()
wpcf7_init_block_editor_assets 0 conflicts Fatal error: Cannot redeclare wpcf7_init_block_editor_assets()
wpcf7_is_date 0 conflicts Fatal error: Cannot redeclare wpcf7_is_date()
wpcf7_is_email 0 conflicts Fatal error: Cannot redeclare wpcf7_is_email()
wpcf7_is_email_in_domain 0 conflicts Fatal error: Cannot redeclare wpcf7_is_email_in_domain()
wpcf7_is_email_in_site_domain 0 conflicts Fatal error: Cannot redeclare wpcf7_is_email_in_site_domain()
wpcf7_is_file_path_in_content_dir 0 conflicts Fatal error: Cannot redeclare wpcf7_is_file_path_in_content_dir()
wpcf7_is_localhost 0 conflicts Fatal error: Cannot redeclare wpcf7_is_localhost()
wpcf7_is_mailbox_list 0 conflicts Fatal error: Cannot redeclare wpcf7_is_mailbox_list()
wpcf7_is_number 0 conflicts Fatal error: Cannot redeclare wpcf7_is_number()
wpcf7_is_tel 0 conflicts Fatal error: Cannot redeclare wpcf7_is_tel()
wpcf7_is_url 0 conflicts Fatal error: Cannot redeclare wpcf7_is_url()
wpcf7_is_valid_locale 0 conflicts Fatal error: Cannot redeclare wpcf7_is_valid_locale()
wpcf7_kses 0 conflicts Fatal error: Cannot redeclare wpcf7_kses()
wpcf7_kses_allowed_html 0 conflicts Fatal error: Cannot redeclare wpcf7_kses_allowed_html()
wpcf7_link 0 conflicts Fatal error: Cannot redeclare wpcf7_link()
wpcf7_listo 0 conflicts Fatal error: Cannot redeclare wpcf7_listo()
wpcf7_load_css 0 conflicts Fatal error: Cannot redeclare wpcf7_load_css()
wpcf7_load_js 0 conflicts Fatal error: Cannot redeclare wpcf7_load_js()
wpcf7_load_textdomain 0 conflicts Fatal error: Cannot redeclare wpcf7_load_textdomain()
wpcf7_log_remote_request 0 conflicts Fatal error: Cannot redeclare wpcf7_log_remote_request()
wpcf7_mail_replace_tags 0 conflicts Fatal error: Cannot redeclare wpcf7_mail_replace_tags()
wpcf7_map_meta_cap 0 conflicts Fatal error: Cannot redeclare wpcf7_map_meta_cap()
wpcf7_mask_password 0 conflicts Fatal error: Cannot redeclare wpcf7_mask_password()
wpcf7_maybe_add_random_dir 0 conflicts Fatal error: Cannot redeclare wpcf7_maybe_add_random_dir()
wpcf7_number_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_number_form_tag_handler()
wpcf7_number_messages 0 conflicts Fatal error: Cannot redeclare wpcf7_number_messages()
wpcf7_number_validation_filter 0 conflicts Fatal error: Cannot redeclare wpcf7_number_validation_filter()
wpcf7_phpmailer_init 0 conflicts Fatal error: Cannot redeclare wpcf7_phpmailer_init()
wpcf7_post_related_smt 0 conflicts Fatal error: Cannot redeclare wpcf7_post_related_smt()
wpcf7_prepend_underscore 0 conflicts Fatal error: Cannot redeclare wpcf7_prepend_underscore()
wpcf7_quiz_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_quiz_form_tag_handler()
wpcf7_quiz_mail_tag 0 conflicts Fatal error: Cannot redeclare wpcf7_quiz_mail_tag()
wpcf7_recaptcha_add_form_tag_recaptcha 0 conflicts Fatal error: Cannot redeclare wpcf7_recaptcha_add_form_tag_recaptcha()
wpcf7_recaptcha_add_hidden_fields 0 conflicts Fatal error: Cannot redeclare wpcf7_recaptcha_add_hidden_fields()
wpcf7_recaptcha_enqueue_scripts 0 conflicts Fatal error: Cannot redeclare wpcf7_recaptcha_enqueue_scripts()
wpcf7_recaptcha_register_service 0 conflicts Fatal error: Cannot redeclare wpcf7_recaptcha_register_service()
wpcf7_recaptcha_verify_response 0 conflicts Fatal error: Cannot redeclare wpcf7_recaptcha_verify_response()
wpcf7_remove_form_tag 0 conflicts Fatal error: Cannot redeclare wpcf7_remove_form_tag()
wpcf7_replace_all_form_tags 0 conflicts Fatal error: Cannot redeclare wpcf7_replace_all_form_tags()
wpcf7_response_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_response_form_tag_handler()
wpcf7_rmdir_p 0 conflicts Fatal error: Cannot redeclare wpcf7_rmdir_p()
wpcf7_sanitize_additional_settings 0 conflicts Fatal error: Cannot redeclare wpcf7_sanitize_additional_settings()
wpcf7_sanitize_form 0 conflicts Fatal error: Cannot redeclare wpcf7_sanitize_form()
wpcf7_sanitize_mail 0 conflicts Fatal error: Cannot redeclare wpcf7_sanitize_mail()
wpcf7_sanitize_messages 0 conflicts Fatal error: Cannot redeclare wpcf7_sanitize_messages()
wpcf7_sanitize_query_var 0 conflicts Fatal error: Cannot redeclare wpcf7_sanitize_query_var()
wpcf7_save_contact_form 0 conflicts Fatal error: Cannot redeclare wpcf7_save_contact_form()
wpcf7_scan_form_tags 0 conflicts Fatal error: Cannot redeclare wpcf7_scan_form_tags()
wpcf7_select_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_select_form_tag_handler()
wpcf7_sendinblue_collect_parameters 0 conflicts Fatal error: Cannot redeclare wpcf7_sendinblue_collect_parameters()
wpcf7_sendinblue_doi_default_email_callback 0 conflicts Fatal error: Cannot redeclare wpcf7_sendinblue_doi_default_email_callback()
wpcf7_sendinblue_doi_default_optin_callback 0 conflicts Fatal error: Cannot redeclare wpcf7_sendinblue_doi_default_optin_callback()
wpcf7_sendinblue_doi_register_agent 0 conflicts Fatal error: Cannot redeclare wpcf7_sendinblue_doi_register_agent()
wpcf7_sendinblue_editor_panels 0 conflicts Fatal error: Cannot redeclare wpcf7_sendinblue_editor_panels()
wpcf7_sendinblue_register_property 0 conflicts Fatal error: Cannot redeclare wpcf7_sendinblue_register_property()
wpcf7_sendinblue_register_service 0 conflicts Fatal error: Cannot redeclare wpcf7_sendinblue_register_service()
wpcf7_sendinblue_save_contact_form 0 conflicts Fatal error: Cannot redeclare wpcf7_sendinblue_save_contact_form()
wpcf7_sendinblue_submit 0 conflicts Fatal error: Cannot redeclare wpcf7_sendinblue_submit()
wpcf7_site_related_smt 0 conflicts Fatal error: Cannot redeclare wpcf7_site_related_smt()
wpcf7_strip_newline 0 conflicts Fatal error: Cannot redeclare wpcf7_strip_newline()
wpcf7_stripe_add_flamingo_inbound_message_params 0 conflicts Fatal error: Cannot redeclare wpcf7_stripe_add_flamingo_inbound_message_params()
wpcf7_stripe_before_send_mail 0 conflicts Fatal error: Cannot redeclare wpcf7_stripe_before_send_mail()
wpcf7_stripe_enqueue_scripts 0 conflicts Fatal error: Cannot redeclare wpcf7_stripe_enqueue_scripts()
wpcf7_stripe_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_stripe_form_tag_handler()
wpcf7_stripe_get_payment_link 0 conflicts Fatal error: Cannot redeclare wpcf7_stripe_get_payment_link()
wpcf7_stripe_register_service 0 conflicts Fatal error: Cannot redeclare wpcf7_stripe_register_service()
wpcf7_stripe_skip_spam_check 0 conflicts Fatal error: Cannot redeclare wpcf7_stripe_skip_spam_check()
wpcf7_stripe_smt 0 conflicts Fatal error: Cannot redeclare wpcf7_stripe_smt()
wpcf7_submit_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_submit_form_tag_handler()
wpcf7_support_html5 0 conflicts Fatal error: Cannot redeclare wpcf7_support_html5()
wpcf7_support_html5_fallback 0 conflicts Fatal error: Cannot redeclare wpcf7_support_html5_fallback()
wpcf7_tag_generator_acceptance 0 conflicts Fatal error: Cannot redeclare wpcf7_tag_generator_acceptance()
wpcf7_tag_generator_captcha 0 conflicts Fatal error: Cannot redeclare wpcf7_tag_generator_captcha()
wpcf7_tag_generator_checkbox 0 conflicts Fatal error: Cannot redeclare wpcf7_tag_generator_checkbox()
wpcf7_tag_generator_date 0 conflicts Fatal error: Cannot redeclare wpcf7_tag_generator_date()
wpcf7_tag_generator_file 0 conflicts Fatal error: Cannot redeclare wpcf7_tag_generator_file()
wpcf7_tag_generator_menu 0 conflicts Fatal error: Cannot redeclare wpcf7_tag_generator_menu()
wpcf7_tag_generator_number 0 conflicts Fatal error: Cannot redeclare wpcf7_tag_generator_number()
wpcf7_tag_generator_quiz 0 conflicts Fatal error: Cannot redeclare wpcf7_tag_generator_quiz()
wpcf7_tag_generator_submit 0 conflicts Fatal error: Cannot redeclare wpcf7_tag_generator_submit()
wpcf7_tag_generator_text 0 conflicts Fatal error: Cannot redeclare wpcf7_tag_generator_text()
wpcf7_tag_generator_textarea 0 conflicts Fatal error: Cannot redeclare wpcf7_tag_generator_textarea()
wpcf7_text_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_text_form_tag_handler()
wpcf7_text_messages 0 conflicts Fatal error: Cannot redeclare wpcf7_text_messages()
wpcf7_textarea_form_tag_handler 0 conflicts Fatal error: Cannot redeclare wpcf7_textarea_form_tag_handler()
wpcf7_unship_uploaded_file 0 conflicts Fatal error: Cannot redeclare wpcf7_unship_uploaded_file()
wpcf7_upgrade_recaptcha_v2_v3 0 conflicts Fatal error: Cannot redeclare wpcf7_upgrade_recaptcha_v2_v3()
wpcf7_use_really_simple_captcha 0 conflicts Fatal error: Cannot redeclare wpcf7_use_really_simple_captcha()
wpcf7_user_related_smt 0 conflicts Fatal error: Cannot redeclare wpcf7_user_related_smt()
wpcf7_validate_configuration 0 conflicts Fatal error: Cannot redeclare wpcf7_validate_configuration()
wpcf7_version 0 conflicts Fatal error: Cannot redeclare wpcf7_version()
wpcf7_version_grep 0 conflicts Fatal error: Cannot redeclare wpcf7_version_grep()

Using Contact Form 7 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 Contact Form 7 from the command line with WP-CLI

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

wp plugin install contact-form-7

How to activate Contact Form 7 from the command line with WP-CLI

To immediately activate Contact Form 7 after WP-CLI downloads the latest version you can use the following command:

wp plugin install contact-form-7 --activate

How to reinstall Contact Form 7 from the command line with WP-CLI

To force a reinstallation of Contact Form 7 which overwrites the current plugin without asking for confirmation you can use the following command:

wp plugin install contact-form-7 --force

How to update Contact Form 7 to the latest version from the command line with WP-CLI

wp plugin update contact-form-7

How to delete Contact Form 7 from the command line with WP-CLI

wp plugin delete contact-form-7

Where can you download earlier versions of Contact Form 7?

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 Contact Form 7 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 Contact Form 7

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 Contact Form 7. Different versions of WordPress could implement the features of this plugin in slightly different ways as well.