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! Regards, -- Yasuo Ohgaki yohg...@ohgaki.net -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php
