PHP_CONV_ERR_UNKNOWN  457 ext/standard/filters.c 			err = PHP_CONV_ERR_UNKNOWN;
PHP_CONV_ERR_UNKNOWN 1640 ext/standard/filters.c 				case PHP_CONV_ERR_UNKNOWN:
PHP_CONV_ERR_UNKNOWN 1711 ext/standard/filters.c 			case PHP_CONV_ERR_UNKNOWN: