Semen Dubina wrote on 07.01.2019 16:38: > Hi, everyone! > Original PR and description see: https://github.com/php/php-src/pull/3460. > > Because of the accuracy constraint set by the 'precision' variable, debugging > problems often occur, and many developers consider the limited accuracy to be > a > feature of the language. > For better compatibility with other languages and predictable behavior, I > suggest changing the default value of the variable 'precision' to -1. > In the tracker you can find several bugs in which people trusted output of > 'var_dump' and 'echo': > https://bugs.php.net/bug.php?id=66866 > https://bugs.php.net/bug.php?id=66959 > https://bugs.php.net/bug.php?id=68551 > https://bugs.php.net/bug.php?id=73358 > > Examples: https://3v4l.org/Mr4KM > > If you know a case when it will violate some task, describe it, please. I > think > that the trusting of FLOAT is a very bad practice. > > -- Semen V. Dubina https://sam002.net/ > > -- > PHP Internals - PHP Runtime Development Mailing List > To unsubscribe, visit: http://www.php.net/unsub.php >
Hello, good point, having: echo ini_get('precision') . PHP_EOL; echo ini_get('serialize_precision') . PHP_EOL; echo json_encode(array('price' => round('45.99', 2))) . PHP_EOL; echo (0.1+0.7), json_encode(0.1+0.7) . PHP_EOL; gives (https://3v4l.org/ldgo8): Output for 7.1.0 - 7.3.0 14 -1 {"price":45.99} 0.80.7999999999999999 Output for 5.3.6 - 5.6.38, 7.0.0 - 7.0.33 14 17 {"price":45.99} 0.80.8 what is the preferred way to upgrade from php 5.6 to 7.x in order to get the same results? Regards Thomas -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php