_post_format_wp_get_object_terms() – Remove the post format prefix from the name property of the term objects created by wp_get_object_terms().
_restore_wpautop_hook() – If do_blocks() needs to remove wp_autop() from the `the_content` filter, this re-adds it afterwards, for subsequent `the_content` usage.
_wp_add_global_attributes() – Helper function to add global attributes to a tag in the allowed html list.
_wp_admin_bar_init() – Instantiate the admin bar object and set it up as a global for access elsewhere.
_wp_ajax_delete_comment_response() – Sends back current comment total and new page links if they need to be updated.
_wp_auto_add_pages_to_menu() – Automatically add newly published page objects to menus with that as an option.
_wp_check_for_scheduled_split_terms() – In order to avoid the _wp_batch_split_terms() job being accidentally removed, check that it’s still scheduled while we haven’t finished splitting terms.
_wp_check_split_default_terms() – Check default categories when a term gets split to see if any of them need to be updated.
_wp_check_split_terms_in_menus() – Check menu items when a term gets split to see if any of them need to be updated.
_wp_customize_changeset_filter_insert_post_data() – Filters changeset post data upon insert to ensure post_name is intact.
_wp_delete_customize_changeset_dependent_auto_drafts() – Delete auto-draft posts associated with the supplied changeset.
_wp_delete_tax_menu_item() – Serves as a callback for handling a menu item when its original object is deleted.
_wp_die_process_input() – Processes arguments passed to {@see wp_die()} consistently for its handlers.
_WP_Editors::force_uncompressed_tinymce() – Force uncompressed TinyMCE when a custom theme has been defined.
_WP_Editors::get_mce_locale() – Fires when the editor scripts are loaded for later initialization, after all scripts and settings are printed.
_WP_Editors::print_default_editor_scripts() – Print (output) all editor scripts and default settings.
_WP_Editors::wp_mce_translation() – Translates the default TinyMCE strings and returns them as JSON encoded object ready to be loaded with tinymce.addI18n(), or as JS snippet that should run after tinymce.js is loaded.
_wp_expand_nav_menu_post_data() – If a JSON blob of navigation menu data is in POST data, expand it and inject it into `$_POST` to avoid PHP `max_input_vars` limitations. See #14134.
_wp_handle_upload() – Handle PHP uploads in WordPress, sanitizing file names, checking extensions for mime type, and moving the file to the appropriate directory within the uploads directory.
_wp_keep_alive_customize_changeset_dependent_auto_drafts() – Make sure that auto-draft posts get their post_date bumped or status changed to draft to prevent premature garbage-collection.
_wp_menu_item_classes_by_context() – Add the class property classes for the current context, if applicable.
_wp_mysql_week() – Return a MySQL expression for selecting the week number based on the start_of_week option.
_wp_personal_data_cleanup_requests() – Cleans up failed and expired requests before displaying the list table.
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