zend_hex_strtod  3177 Zend/zend_language_scanner.c 		ZVAL_DOUBLE(zendlval, zend_hex_strtod(hex, (const char **)&end));
zend_hex_strtod    31 Zend/zend_strtod.h ZEND_API double zend_hex_strtod(const char *str, const char **endptr);