Re: [RFC] [DISCUSSION] More precise float value

On Fri, Sep 4, 2015 at 1:41 AM, Yasuo Ohgaki <yohgaki@ohgaki.net> wrote: > Hi all, > > IEEE 754 double cannot express exact float values. That said, > float values expressed by json/serialize/var_export/echo/print > are not precise enough in many cases. > > Issues: > - json_encode() uses EG(precision)=14 that truncates float values. > echo()/print() > does this as well. > - large EG(precision)/PG(serialize_precision) prints meaningless values. > > This RFC proposes zend_dtoa()'s 0 mode support which rounds float value > to nearest value. > > https://wiki.php.net/rfc/precise_float_value > https://github.com/php/php-src/pull/1455 > > This change is simple enough for PHP 7.0. IMO. > Comments/suggestions are appreciated! > > Hi, After asking Yasuo, I'm putting forward this RFC to have more precise float to string decoding at least in PHP 7.1. I cleaned the RFC up a little bit and it's targeting just 7.1. It has been some time since this was announced so I will keep it open for a week or two and then plan to start vote. Cheers Jakub