wp-admin/includes/ajax-actions.php:1110Handles adding a tag via AJAX.
function wp_ajax_add_tag() { check_ajax_referer( 'add-tag', '_wpnonce_add-tag' ); $taxonomy = ! empty( $_POST['taxonomy'] ) ? $_POST['taxonomy'] : 'post_tag'; $taxonomy_object = get_taxonomy( $taxonomy ); if ( ! current_user_can( $taxonomy_object->cap->edit_terms ) ) { wp_die( -1 ); } $response = new WP_Ajax_Response(); $tag = wp_insert_term( $_POST['tag-name'], $taxonomy, $_POST ); if ( $tag && ! is_wp_error( $tag ) ) { $tag = get_term( $tag['term_id'], $taxonomy ); } if ( ! $tag || is_wp_error( $tag ) ) { $message = __( 'An error has occurred. Please reload the page and try again.' ); $error_code = 'error'; if ( is_wp_error( $tag ) && $tag->get_error_message() ) { $message = $tag->get_error_message(); } if ( is_wp_error( $tag ) && $tag->get_error_code() ) { $error_code = $tag->get_error_code(); } $response->add( array( 'what' => 'taxonomy', 'data' => new WP_Error( $error_code, $message ), ) ); $response->send(); } $wp_list_table = _get_list_table( 'WP_Terms_List_Table', array( 'screen' => $_POST['screen'] ) ); $level = 0; $no_parents = ''; if ( is_taxonomy_hierarchical( $taxonomy ) ) { $level = count( get_ancestors( $tag->term_id, $taxonomy, 'taxonomy' ) ); ob_start(); $wp_list_table->single_row( $tag, $level ); $no_parents = ob_get_clean(); } ob_start(); $wp_list_table->single_row( $tag ); $parents = ob_get_clean(); require ABSPATH . 'wp-admin/includes/edit-tag-messages.php'; $message = ''; if ( isset( $messages[ $taxonomy_object->name ][1] ) ) { $message = $messages[ $taxonomy_object->name ][1]; } elseif ( isset( $messages['_item'][1] ) ) { $message = $messages['_item'][1]; } $response->add( array( 'what' => 'taxonomy', 'data' => $message, 'supplemental' => array( 'parents' => $parents, 'noparents' => $no_parents, 'notice' => $message, ), ) ); $response->add( array( 'what' => 'term', 'position' => $level,Introduced in 3.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/ajax-actions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.