WP_REST_Revisions_Controller::restore_post_data( WP_Post|null $previous_post )

765	private function restore_post_data( ?WP_Post $previous_post ): void {766		if ( $previous_post ) {767			$GLOBALS['post'] = $previous_post;768			setup_postdata( $previous_post );769			return;770		}771 772		/*773		 * There was no global post to restore, so clear the revision's post data.774		 * This runs before clearing the global post because wp_reset_postdata()775		 * repopulates it from the main query whenever that query has a post. Note776		 * that it is a no-op when the main query has no post, in which case only777		 * the global post below is cleared.778		 */779		wp_reset_postdata();780 781		/*782		 * Assigned rather than unset so that any `global $post` binding made before783		 * this request keeps pointing at the global. Unsetting removes the entry from784		 * the symbol table, which detaches those bindings, and a later write through785		 * one of them would no longer be visible to get_post().786		 */787		$GLOBALS['post'] = null;788	}