sanitize_key() WordPress Function

function sanitize_key( $key ) {
	$sanitized_key = '';

	if ( is_scalar( $key ) ) {
		$sanitized_key = strtolower( $key );
		$sanitized_key = preg_replace( '/[^a-z0-9_\-]/', '', $sanitized_key );
	}

	/**
	 * Filters a sanitized key string.
	 *
	 * @since 3.0.0
	 *
	 * @param string $sanitized_key Sanitized key.
	 * @param string $key           The key prior to sanitization.
	 */
	return apply_filters( 'sanitize_key', $sanitized_key, $key );
}
Uses	Description
wp-includes/formatting.php:sanitize_key	Filters a sanitized key string.
wp-includes/plugin.php:apply_filters()	Calls the callback functions that have been added to a filter hook.
Used By	Description
wp-includes/blocks.php:_wp_multiple_block_styles()	Allows multiple block styles.
wp-includes/user.php:wp_create_user_request()	Creates and logs a user request to perform a specific action.
wp-admin/includes/privacy-tools.php:_wp_personal_data_handle_actions()	Handle list table actions.
wp-includes/load.php:wp_start_scraping_edited_file_errors()	Start scraping edited file errors.
wp-includes/class-wp-customize-manager.php:WP_Customize_Manager::handle_load_themes_request()	Loads themes into the theme browsing/installation UI.
wp-includes/class-wp-theme.php:WP_Theme::get_post_templates()	Returns the theme’s post templates.
wp-admin/includes/ajax-actions.php:wp_ajax_search_install_plugins()	Ajax handler for searching plugins to install.
wp-admin/includes/ajax-actions.php:wp_ajax_delete_plugin()	Ajax handler for deleting a plugin.
wp-admin/includes/ajax-actions.php:wp_ajax_search_plugins()	Ajax handler for searching plugins.
wp-admin/includes/ajax-actions.php:wp_ajax_install_theme()	Ajax handler for installing a theme.
wp-admin/includes/ajax-actions.php:wp_ajax_install_plugin()	Ajax handler for installing a plugin.
wp-includes/customize/class-wp-customize-nav-menu-item-setting.php:WP_Customize_Nav_Menu_Item_Setting::sanitize()	Sanitize an input.
wp-includes/class-wp-customize-nav-menus.php:WP_Customize_Nav_Menus::ajax_load_available_items()	Ajax handler for loading available menu items.
wp-admin/includes/ajax-actions.php:wp_ajax_update_plugin()	Ajax handler for updating a plugin.
wp-includes/class-wp-query.php:WP_Query::parse_orderby()	Converts the given orderby alias (if allowed) to a properly-prefixed value.
wp-admin/includes/class-wp-screen.php:WP_Screen::get()	Fetches a screen object.
wp-admin/includes/export.php:export_wp()	Generates the WXR export file for download.
wp-admin/includes/class-wp-list-table.php:WP_List_Table::__construct()	Constructor.
wp-includes/ms-deprecated.php:update_user_status()	Update the status of a user in the database.
wp-admin/includes/misc.php:set_screen_options()	Saves option for number of rows when listing posts, pages, comments, etc.
wp-admin/includes/post.php:post_preview()	Saves a draft or manually autosaves for the purpose of showing a post preview.
wp-admin/includes/post.php:_wp_translate_postdata()	Renames `$_POST` data from form names to DB post columns.
wp-admin/includes/post.php:edit_post()	Updates an existing post with values provided in `$_POST`.
wp-admin/includes/post.php:bulk_edit_posts()	Processes the post data for the bulk editing of posts.
wp-admin/includes/ajax-actions.php:wp_ajax_heartbeat()	Ajax handler for the Heartbeat API.
wp-admin/includes/ajax-actions.php:wp_ajax_save_user_color_scheme()	Ajax handler for auto-saving the selected color scheme for a user’s own profile.
wp-admin/includes/ajax-actions.php:wp_ajax_dismiss_wp_pointer()	Ajax handler for dismissing a WordPress pointer.
wp-admin/includes/ajax-actions.php:wp_ajax_closed_postboxes()	Ajax handler for closed post boxes.
wp-admin/includes/ajax-actions.php:wp_ajax_hidden_columns()	Ajax handler for hidden columns.
wp-admin/includes/ajax-actions.php:wp_ajax_meta_box_order()	Ajax handler for saving the meta box order.
wp-admin/includes/ajax-actions.php:wp_ajax_inline_save_tax()	Ajax handler for quick edit saving for a term.
wp-admin/includes/ajax-actions.php:wp_ajax_get_tagcloud()	Ajax handler for getting a tagcloud.
wp-admin/includes/ajax-actions.php:wp_ajax_nopriv_heartbeat()	Ajax handler for the Heartbeat API in the no-privilege context.
wp-admin/includes/ajax-actions.php:wp_ajax_ajax_tag_search()	Ajax handler for tag search.
wp-admin/includes/class-wp-comments-list-table.php:WP_Comments_List_Table::prepare_items()
wp-includes/class-wp-customize-manager.php:WP_Customize_Manager::__construct()	Constructor.
wp-includes/theme.php:_wp_customize_include()	Includes and instantiates the WP_Customize_Manager class.
wp-includes/class-wp-query.php:WP_Query::parse_query()	Parse a query string and set query type booleans.
wp-includes/class-wp-tax-query.php:WP_Tax_Query::transform_query()	Transforms a single query, from one field to another.
wp-includes/class-wp-user-query.php:WP_User_Query::prepare_query()	Prepares the query variables.
wp-includes/post.php:_get_last_post_time()	Gets the timestamp of the last time any post was modified or published.
wp-includes/post.php:register_post_status()	Register a post status. Do not use before init.
wp-includes/post.php:register_post_type()	Registers a post type.
wp-includes/revision.php:_wp_preview_terms_filter()	Filters terms lookup to set the post format.
wp-includes/post-formats.php:has_post_format()	Check if a post has any of the given formats, or any format.
wp-includes/post-formats.php:set_post_format()	Assign a format to a post
wp-includes/nav-menu.php:wp_update_nav_menu_item()	Saves the properties of a menu item or create a new one.
wp-includes/class-wp-xmlrpc-server.php:wp_xmlrpc_server::mw_editPost()	Edit a post.
wp-includes/class-wp-xmlrpc-server.php:wp_xmlrpc_server::mw_newPost()	Create a new post.
wp-includes/class-wp-meta-query.php:WP_Meta_Query::get_sql()	Generates SQL clauses to be appended to a main query.
wp-includes/meta.php:delete_metadata()	Deletes metadata for the specified object.
wp-includes/meta.php:update_metadata_by_mid()	Updates metadata by meta ID.
wp-includes/meta.php:delete_metadata_by_mid()	Deletes metadata by meta ID.
wp-includes/meta.php:update_meta_cache()	Updates the metadata cache for the specified objects.
wp-includes/meta.php:add_metadata()	Adds metadata for the specified object.
wp-includes/meta.php:update_metadata()	Updates metadata for the specified object. If no value already exists for the specified object ID and metadata key, the metadata will be added.