Proposal: change precision for output functions

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/