_wp_get_attachment_relative_path( string $file ): string

1244function _wp_get_attachment_relative_path( $file ) {1245	$dirname = dirname( $file );1246 1247	if ( '.' === $dirname ) {1248		return '';1249	}1250 1251	if ( str_contains( $dirname, 'wp-content/uploads' ) ) {1252		// Get the directory name relative to the upload directory (back compat for pre-2.7 uploads).1253		$dirname = substr( $dirname, strpos( $dirname, 'wp-content/uploads' ) + 18 );1254		$dirname = ltrim( $dirname, '/' );1255	}1256 1257	return $dirname;1258}