get_admin_page_parent( string $parent_page = '' ): string

1970function get_admin_page_parent( $parent_page = '' ) {1971	global $parent_file, $menu, $submenu, $pagenow, $typenow,1972		$plugin_page, $_wp_real_parent_file, $_wp_menu_nopriv, $_wp_submenu_nopriv;1973 1974	if ( ! empty( $parent_page ) && 'admin.php' !== $parent_page ) {1975		return $_wp_real_parent_file[ $parent_page ] ?? $parent_page;1976	}1977 1978	if ( 'admin.php' === $pagenow && isset( $plugin_page ) ) {1979		foreach ( (array) $menu as $parent_menu ) {1980			if ( $parent_menu[2] === $plugin_page ) {1981				$parent_file = $plugin_page;1982				return $_wp_real_parent_file[ $parent_file ] ?? $parent_file;1983			}1984		}1985		if ( isset( $_wp_menu_nopriv[ $plugin_page ] ) ) {1986			$parent_file = $plugin_page;1987			return $_wp_real_parent_file[ $parent_file ] ?? $parent_file;1988		}1989	}1990 1991	if ( isset( $plugin_page ) && isset( $_wp_submenu_nopriv[ $pagenow ][ $plugin_page ] ) ) {1992		$parent_file = $pagenow;1993		return $_wp_real_parent_file[ $parent_file ] ?? $parent_file;1994	}1995 1996	foreach ( array_keys( (array) $submenu ) as $parent_page ) {1997		foreach ( $submenu[ $parent_page ] as $submenu_array ) {1998			if ( isset( $_wp_real_parent_file[ $parent_page ] ) ) {1999				$parent_page = $_wp_real_parent_file[ $parent_page ];2000			}2001 2002			if ( ! empty( $typenow ) && "$pagenow?post_type=$typenow" === $submenu_array[2] ) {2003				$parent_file = $parent_page;2004				return $parent_page;2005			} elseif ( empty( $typenow ) && $pagenow === $submenu_array[2]2006				&& ( empty( $parent_file ) || ! str_contains( $parent_file, '?' ) )2007			) {2008				$parent_file = $parent_page;2009				return $parent_page;2010			} elseif ( isset( $plugin_page ) && $plugin_page === $submenu_array[2] ) {2011				$parent_file = $parent_page;2012				return $parent_page;2013			}2014		}2015	}2016 2017	if ( empty( $parent_file ) ) {2018		$parent_file = '';2019	}2020	return '';2021}