PHP_CONV_ERR_UNKNOWN  447 ext/standard/filters.c 			err = PHP_CONV_ERR_UNKNOWN;
PHP_CONV_ERR_UNKNOWN 1564 ext/standard/filters.c 				case PHP_CONV_ERR_UNKNOWN:
PHP_CONV_ERR_UNKNOWN 1635 ext/standard/filters.c 			case PHP_CONV_ERR_UNKNOWN: