wpsnoop: fix Subscribe Forms plugin conflicts, errors & issues

When the plugin Subscribe Forms 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 Subscribe Forms, plus learn which plugins and/or themes could be in conflict with Subscribe Forms.


Troubleshooting theme and plugin conflicts is easier when you know what Subscribe Forms 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 Subscribe Forms

Get professional support for Subscribe Forms here

When you need professional help with WordPress: get help here


What does Subscribe Forms version 1.5.4 add to WordPress? Answers Here.

This is an automatically generated report - it is possible for Subscribe Forms to perform differently in your installation, previous versions before 1.5.4 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 1.5.4 of Subscribe Forms 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 Subscribe Forms 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.

Which new files does Subscribe Forms add to WordPress?

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

Type & Path Size Conflicts
wp-content/plugins/wp-subscribe-form/ 1.69MB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/class-affiliate.php 8.41kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/class-review-box.php 13.23kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/forms/ 48.23kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/forms/subscribeform1-optin.php 2.19kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/forms/subscribeform1-options.php 28.10kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/forms/subscribeform1-settings.php 5.50kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/forms/subscribeform1.php 12.44kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/help.php 7.62kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/ 431.09kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/ac-logo.png 2.12kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/agency-price.png 37.09kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/basic-price-bg.png 23.86kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/convertkit-long.svg 3.73kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/gist-logo.svg 6.07kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/gr-logo.svg 6.32kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/hubspot-crm-logo.png 3.64kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/icontact-logo.png 1.20kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/logo-ctct-color.svg 10.05kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/logo-sendinblue.svg 4.91kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/mailerlite-logo.png 3.53kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/mailpoet-logo.svg 8.62kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/mc-logo.png 4.15kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/mm-logo.png 24.52kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/owner.png 41.52kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/pipedrive-logo.svg 20.36kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/plus-price.png 27.95kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/premio-owner.png 2.99kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/prism.jpg 69.98kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/sendfox-logo.svg 1.36kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/sfba-envelope.png 724.00B No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/thanks.gif 124.60kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/images/tick.png 1.84kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/ 1.17MB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/css/ 40.16kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/css/admin-setting.css 15.06kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/css/select2.min.css 14.83kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/css/sfba-style.css 10.28kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/deactivate-form.php 9.14kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/ 535.55kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/agency-price.png 37.09kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/basic-price-bg.png 23.86kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/client-image.jpg 11.60kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/form1.png 3.39kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/form10.png 14.12kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/form11.png 3.28kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/form12.png 62.13kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/form2.png 4.71kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/form3.png 4.43kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/form4.png 43.65kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/form5.png 5.36kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/form6.png 75.14kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/form7.png 5.13kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/form8.png 5.84kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/form9.png 6.94kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/gears.gif 60.82kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/link_icon.png 563.00B No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/payment.png 3.84kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/plus-price.png 27.95kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/promotion.png 135.30kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/images/rpt_recommended.png 430.00B No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/js/ 116.96kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/js/clipboard.min.js 10.21kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/js/jquery.sticky-kit.min.js 2.74kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/js/select2.min.js 77.36kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/js/select2.multi-checkboxes.js 2.68kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/js/sfba-color-picker.js 4.93kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/js/sfba-form-ajax.js 4.01kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/js/sfba-script.js 15.03kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/jsonRPCClient.php 9.91kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/MCAPI.class.php 175.25kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/recommended-plugins.php 17.95kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba_subcribers_list.csv No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba_subscriber_list.php 2.14kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba_support_process.php 2.51kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba-ajax-handler.php 6.20kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba-custom-columns.php 3.69kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba-enqueue-scripts.php 3.06kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba-fonts.php 32.57kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba-post-meta-boxes.php 20.62kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba-post-type.php 5.40kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba-save-post-meta.php 7.40kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba-shortcode.php 128.86kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba-subscribers-list.php 11.50kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba-subscription-ajax.php 0.98kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba-subscription-page.php 24.72kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba-subscription-table.php 1.37kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/sfba-support-page.php 15.78kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/update-form.php 1.76kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/includes/upgrade-to-pro.php 21.42kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/index.php 9.81kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/languages/ No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/languages/index.html No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/readme.txt 12.47kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/subscribe.class.php 6.55kB No known conflicts with other themes or plugins.
wp-content/plugins/wp-subscribe-form/uninstall.php 546.00B No known conflicts with other themes or plugins.

Which new shortcodes does Subscribe Forms add to WordPress?

ShortCode   Known Plugin or Theme conflicts
[arrow_forms] The arrow_forms shortcode doesn't have any known conflicts with other themes or plugins.

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 Subscribe Forms?

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

Option Name   Known Conflicts
sfba_db_version The sfba_db_version option doesn't have any known conflicts with other themes or plugins.
subscribe_forms_redirect_status The subscribe_forms_redirect_status option doesn't have any known conflicts with other themes or plugins.

During use Subscribe Forms 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 Subscribe Forms declare when it is active?

Function   Conflicts Common Errors
change_publish_button 4 conflicts Fatal error: Cannot redeclare change_publish_button()
my_action_javascript 17 conflicts Fatal error: Cannot redeclare my_action_javascript()
upgrade_to_pro 4 conflicts Fatal error: Cannot redeclare upgrade_to_pro()
maybe_sfba_render_blank_state 0 conflicts Fatal error: Cannot redeclare maybe_sfba_render_blank_state()
premio_subscribe_admin_scripts 0 conflicts Fatal error: Cannot redeclare premio_subscribe_admin_scripts()
sfba_activation_redirect 0 conflicts Fatal error: Cannot redeclare sfba_activation_redirect()
sfba_add_integration_options 0 conflicts Fatal error: Cannot redeclare sfba_add_integration_options()
sfba_add_meta_boxes 0 conflicts Fatal error: Cannot redeclare sfba_add_meta_boxes()
sfba_ajax_load_scripts 0 conflicts Fatal error: Cannot redeclare sfba_ajax_load_scripts()
sfba_ajax_process 0 conflicts Fatal error: Cannot redeclare sfba_ajax_process()
sfba_arrow_forms_shortcode 0 conflicts Fatal error: Cannot redeclare sfba_arrow_forms_shortcode()
sfba_create_table_function 0 conflicts Fatal error: Cannot redeclare sfba_create_table_function()
sfba_custom_form_columns 0 conflicts Fatal error: Cannot redeclare sfba_custom_form_columns()
sfba_custom_menu_pages 0 conflicts Fatal error: Cannot redeclare sfba_custom_menu_pages()
sfba_custom_posts_columns 0 conflicts Fatal error: Cannot redeclare sfba_custom_posts_columns()
sfba_delete_db_data 0 conflicts Fatal error: Cannot redeclare sfba_delete_db_data()
sfba_delete_db_record 0 conflicts Fatal error: Cannot redeclare sfba_delete_db_record()
sfba_enqueue_styles 0 conflicts Fatal error: Cannot redeclare sfba_enqueue_styles()
sfba_enter_title_here 0 conflicts Fatal error: Cannot redeclare sfba_enter_title_here()
sfba_fonts 0 conflicts Fatal error: Cannot redeclare sfba_fonts()
sfba_form_load_form_ui 0 conflicts Fatal error: Cannot redeclare sfba_form_load_form_ui()
sfba_form_showcase_meta_box_ui 0 conflicts Fatal error: Cannot redeclare sfba_form_showcase_meta_box_ui()
sfba_media_files 0 conflicts Fatal error: Cannot redeclare sfba_media_files()
sfba_plugin_update 0 conflicts Fatal error: Cannot redeclare sfba_plugin_update()
sfba_recommended_plugins 0 conflicts Fatal error: Cannot redeclare sfba_recommended_plugins()
sfba_register_integration_options 0 conflicts Fatal error: Cannot redeclare sfba_register_integration_options()
sfba_save_form 0 conflicts Fatal error: Cannot redeclare sfba_save_form()
sfba_shortcode_meta_box_ui 0 conflicts Fatal error: Cannot redeclare sfba_shortcode_meta_box_ui()
sfba_subscribe_form_function 0 conflicts Fatal error: Cannot redeclare sfba_subscribe_form_function()
sfba_subscriber_options_menu 0 conflicts Fatal error: Cannot redeclare sfba_subscriber_options_menu()
sfba_subscribers_list_menu 0 conflicts Fatal error: Cannot redeclare sfba_subscribers_list_menu()
sfba_support_page 0 conflicts Fatal error: Cannot redeclare sfba_support_page()
subscribe_form_send_message_to_owner 0 conflicts Fatal error: Cannot redeclare subscribe_form_send_message_to_owner()
subscribers_form_admin_footer 0 conflicts Fatal error: Cannot redeclare subscribers_form_admin_footer()

Using Subscribe Forms 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 Subscribe Forms from the command line with WP-CLI

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

wp plugin install wp-subscribe-form


How to activate Subscribe Forms from the command line with WP-CLI

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

wp plugin install wp-subscribe-form --activate


How to reinstall Subscribe Forms from the command line with WP-CLI

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

wp plugin install wp-subscribe-form --force


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

wp plugin update wp-subscribe-form


How to delete Subscribe Forms from the command line with WP-CLI

wp plugin delete wp-subscribe-form

Where can you download earlier versions of Subscribe Forms?

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 Subscribe Forms 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 Subscribe Forms

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 Subscribe Forms. Different versions of WordPress could implement the features of this plugin in slightly different ways as well.