wp-admin/includes/ajax-actions.php:590Handles adding a hierarchical term via AJAX.
One hook fires while _wp_ajax_add_hierarchical_term() runs, in this order:
Filters the arguments for the taxonomy parent dropdown on the Post Edit page.
function _wp_ajax_add_hierarchical_term() { $action = $_POST['action']; $taxonomy = get_taxonomy( substr( $action, 4 ) ); check_ajax_referer( $action, '_ajax_nonce-add-' . $taxonomy->name ); if ( ! current_user_can( $taxonomy->cap->edit_terms ) ) { wp_die( -1 ); } $names = explode( ',', $_POST[ 'new' . $taxonomy->name ] ); $parent = isset( $_POST[ 'new' . $taxonomy->name . '_parent' ] ) ? (int) $_POST[ 'new' . $taxonomy->name . '_parent' ] : 0; if ( 0 > $parent ) { $parent = 0; } if ( 'category' === $taxonomy->name ) { $post_category = isset( $_POST['post_category'] ) ? (array) $_POST['post_category'] : array(); } else { $post_category = ( isset( $_POST['tax_input'] ) && isset( $_POST['tax_input'][ $taxonomy->name ] ) ) ? (array) $_POST['tax_input'][ $taxonomy->name ] : array(); } $checked_categories = array_map( 'absint', (array) $post_category ); $popular_ids = wp_popular_terms_checklist( $taxonomy->name, 0, 10, false ); foreach ( $names as $category_name ) { $category_name = trim( $category_name ); $category_nicename = sanitize_title( $category_name ); if ( '' === $category_nicename ) { continue; } $category_id = wp_insert_term( $category_name, $taxonomy->name, array( 'parent' => $parent ) ); if ( ! $category_id || is_wp_error( $category_id ) ) { continue; } else { $category_id = $category_id['term_id']; } $checked_categories[] = $category_id; if ( $parent ) { // Do these all at once in a second. continue; } ob_start(); wp_terms_checklist( 0, array( 'taxonomy' => $taxonomy->name, 'descendants_and_self' => $category_id, 'selected_cats' => $checked_categories, 'popular_cats' => $popular_ids, ) ); $data = ob_get_clean(); $add = array( 'what' => $taxonomy->name, 'id' => $category_id, 'data' => str_replace( array( "\n", "\t" ), '', $data ), 'position' => -1, ); } if ( $parent ) { // Foncy - replace the parent and all its children. $parent = get_term( $parent, $taxonomy->name ); $term_id = $parent->term_id; while ( $parent->parent ) { // Get the top parent. $parent = get_term( $parent->parent, $taxonomy->name ); if ( is_wp_error( $parent ) ) { break; } $term_id = $parent->term_id; }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.