php_get_nan      4024 ext/standard/basic_functions.c 	REGISTER_DOUBLE_CONSTANT("NAN", php_get_nan(), CONST_CS | CONST_PERSISTENT);
php_get_nan       244 ext/standard/basic_functions.h PHPAPI double php_get_nan(void);
php_get_nan       970 ext/standard/var_unserializer.c 		ZVAL_DOUBLE(*rval, php_get_nan());