wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php:471Checks if a request has access to create a term.
$requestWP_REST_Requestbool|WP_Error public function create_item_permissions_check( $request ) { if ( ! $this->check_is_taxonomy_allowed( $this->taxonomy ) ) { return false; } $taxonomy_obj = get_taxonomy( $this->taxonomy ); if ( ( is_taxonomy_hierarchical( $this->taxonomy ) && ! current_user_can( $taxonomy_obj->cap->edit_terms ) ) || ( ! is_taxonomy_hierarchical( $this->taxonomy ) && ! current_user_can( $taxonomy_obj->cap->assign_terms ) ) ) { return new WP_Error( 'rest_cannot_create', __( 'Sorry, you are not allowed to create terms in this taxonomy.' ), array( 'status' => rest_authorization_required_code() ) ); } return true; }Introduced in 4.7.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.