wpsnoop: fix Horizontal Meta plugin conflicts, errors & issues

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


Troubleshooting theme and plugin conflicts is easier when you know what Horizontal Meta 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 Horizontal Meta

Get professional support for Horizontal Meta here

When you need professional help with WordPress: get help here


What does Horizontal Meta version 2.3.1 add to WordPress? Answers Here.

This is an automatically generated report - it is possible for Horizontal Meta to perform differently in your installation, previous versions before 2.3.1 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 2.3.1 of Horizontal Meta 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 Horizontal Meta 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 Horizontal Meta add to WordPress?

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

Type & Path Size Conflicts
wp-content/plugins/horizontal-meta/ 678.18kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/3rdparty/ 9.59kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/3rdparty/meta_key_listing_table.php 5.35kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/3rdparty/meta_key_manage_table.php 4.24kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/controllers/ 34.31kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/controllers/hm_post_meta.php 9.76kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/controllers/hm_premium_filters.php 352.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/controllers/hm_user_meta.php 5.04kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/controllers/hm.php 19.17kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/css/ 7.56kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/css/admin.css 1.47kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/css/styles.css 2.36kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/css/tablesorter/ 3.73kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/css/tablesorter/asc.gif 54.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/css/tablesorter/bg.gif 64.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/css/tablesorter/desc.gif 54.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/css/tablesorter/first.png 720.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/css/tablesorter/last.png 737.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/css/tablesorter/next.png 736.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/css/tablesorter/prev.png 745.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/css/tablesorter/style.css 709.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/functions.php 516.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/functions/ 8.89kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/functions/general.php 234.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/functions/posts.php 4.50kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/functions/users.php 4.17kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/images/ 673.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/images/wait.gif 673.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/init.php 208.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/js/ 33.80kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/js/create-mappings.js 6.73kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/js/functions.js 148.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/js/jquery.tablesorter.min.js 16.13kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/js/jquery.tablesorter.pager.js 3.98kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/js/manage-data.js 1.84kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/js/settings-advanced.js 1.22kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/js/settings.js 3.74kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/languages/ 6.43kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/languages/horizontal-meta.pot 6.43kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/libraries/ 53.74kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/libraries/hm_activation_library.php 112.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/libraries/hm_log_library.php 844.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/libraries/hm_manual_query_library.php 2.70kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/libraries/hm_mappings_library.php 30.02kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/libraries/hm_query_library.php 13.34kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/libraries/hm_sql_library.php 1.37kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/libraries/hm_tools_library.php 5.38kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/loader.php 4.67kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/logs/ No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/models/ 1.94kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/models/hm_settings_model.php 1.94kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/readme.txt 7.11kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/screenshot-1.jpg 70.03kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/screenshot-2.jpg 97.00kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/screenshot-3.jpg 96.73kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/screenshot-4.jpg 106.51kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/screenshot-5.jpg 66.75kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/setup.php 3.70kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/system/ 17.52kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/system/controller_base.php 9.00kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/system/library_base.php 164.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/system/loader_base.php 5.40kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/system/model_base.php 105.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/system/plugin_init.php 2.86kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/terms_of_service.pdf 29.57kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/views/ 20.96kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/views/create_mappings.php 6.25kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/views/manage_data_load_data.php 3.83kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/views/manage_data.php 856.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/views/settings_advanced.php 5.62kB No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/views/settings_remove_mapping.php 397.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/views/settings.php 993.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/views/tabs.php 975.00B No known conflicts with other themes or plugins.
wp-content/plugins/horizontal-meta/views/test_results.php 2.12kB No known conflicts with other themes or plugins.

Which new shortcodes does Horizontal Meta add to WordPress?

Which new database tables are created by the WordPress plugin Horizontal Meta?

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

What new PHP functions does Horizontal Meta declare when it is active?

Function   Conflicts Common Errors
get_user_mappings 1 conflict Fatal error: Cannot redeclare get_user_mappings()
assign_post_meta_mapping 0 conflicts Fatal error: Cannot redeclare assign_post_meta_mapping()
assign_user_meta_mapping 0 conflicts Fatal error: Cannot redeclare assign_user_meta_mapping()
get_hm_mappings 0 conflicts Fatal error: Cannot redeclare get_hm_mappings()
get_post_mappings 0 conflicts Fatal error: Cannot redeclare get_post_mappings()
hm_build_post_sql 0 conflicts Fatal error: Cannot redeclare hm_build_post_sql()
hm_build_user_sql 0 conflicts Fatal error: Cannot redeclare hm_build_user_sql()
hm_get_values_for_post 0 conflicts Fatal error: Cannot redeclare hm_get_values_for_post()
hm_get_values_for_posts 0 conflicts Fatal error: Cannot redeclare hm_get_values_for_posts()
hm_get_values_for_user 0 conflicts Fatal error: Cannot redeclare hm_get_values_for_user()
hm_get_values_for_users 0 conflicts Fatal error: Cannot redeclare hm_get_values_for_users()
hm_horzm_new_blog 0 conflicts Fatal error: Cannot redeclare hm_horzm_new_blog()
hm_is_multisite 0 conflicts Fatal error: Cannot redeclare hm_is_multisite()
hm_load_post_loop_values 0 conflicts Fatal error: Cannot redeclare hm_load_post_loop_values()
hmeta_controller_priority 0 conflicts Fatal error: Cannot redeclare hmeta_controller_priority()
hmeta_get_files_in_folder 0 conflicts Fatal error: Cannot redeclare hmeta_get_files_in_folder()
hmeta_load_controllers 0 conflicts Fatal error: Cannot redeclare hmeta_load_controllers()
hmeta_load_init 0 conflicts Fatal error: Cannot redeclare hmeta_load_init()
hmeta_load_runtime 0 conflicts Fatal error: Cannot redeclare hmeta_load_runtime()
horizontal_meta_activate 0 conflicts Fatal error: Cannot redeclare horizontal_meta_activate()
horizontal_meta_deactivate 0 conflicts Fatal error: Cannot redeclare horizontal_meta_deactivate()
post_mapping_compatible 0 conflicts Fatal error: Cannot redeclare post_mapping_compatible()
post_mapping_exists 0 conflicts Fatal error: Cannot redeclare post_mapping_exists()
post_mapping_test_key 0 conflicts Fatal error: Cannot redeclare post_mapping_test_key()
remove_post_meta_mapping 0 conflicts Fatal error: Cannot redeclare remove_post_meta_mapping()
remove_user_meta_mapping 0 conflicts Fatal error: Cannot redeclare remove_user_meta_mapping()
user_mapping_compatible 0 conflicts Fatal error: Cannot redeclare user_mapping_compatible()
user_mapping_exists 0 conflicts Fatal error: Cannot redeclare user_mapping_exists()
user_mapping_test_key 0 conflicts Fatal error: Cannot redeclare user_mapping_test_key()

Using Horizontal Meta 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 Horizontal Meta from the command line with WP-CLI

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

wp plugin install horizontal-meta


How to activate Horizontal Meta from the command line with WP-CLI

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

wp plugin install horizontal-meta --activate


How to reinstall Horizontal Meta from the command line with WP-CLI

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

wp plugin install horizontal-meta --force


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

wp plugin update horizontal-meta


How to delete Horizontal Meta from the command line with WP-CLI

wp plugin delete horizontal-meta

Where can you download earlier versions of Horizontal Meta?

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 Horizontal Meta 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 Horizontal Meta

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