Bug #68473 [Opn->Nab]: number_format results on high numbers?

Edit report at https://bugs.php.net/bug.php?id=68473&edit=1 ID: 68473 Updated by: aharvey@php.net Reported by: php at kingsquare dot nl Summary: number_format results on high numbers? -Status: Open +Status: Not a bug Type: Bug Package: *General Issues Operating System: n/a PHP Version: 5.6.3 Block user comment: N Private report: N New Comment: This is expected behaviour: number_format expects a float, and therefore the first thing it does when you pass it any kind of number is convert it to a float. Since 23372036854775807 is greater than 2^53 (the highest integer that can be stored in a double precision float without losing precision), results may be... fuzzy. Previous Comments: ------------------------------------------------------------------------ [2014-11-21 16:46:09] php at kingsquare dot nl Description: ------------ We're seeing issues with number_format and strange behaviour. It seems to be rounding off / exceeding some kind of _undocumented_ limit ? (related bug: 62792, but the response there is irrelevant since the PHP_INT_MAX isnt even reached in some cases and still the error persists? And before you go 'floating points and limited percision: this is an int, not a float... :) ) Test script: --------------- <?php echo PHP_INT_MAX.PHP_EOL; echo number_format(PHP_INT_MAX, 0, '', '').PHP_EOL; // ? echo '4'.PHP_EOL; echo number_format(4, 0, '', '').PHP_EOL; // as expected echo '23372036854775807'.PHP_EOL; echo number_format('23372036854775807', 0, '', '').PHP_EOL; // still errors echo '3372036854775807'.PHP_EOL; echo number_format('3372036854775807', 0, '', '').PHP_EOL; // yeah! the same results :) Expected result: ---------------- 9223372036854775807 9223372036854775807 4 4 23372036854775807 23372036854775807 3372036854775807 3372036854775807 Actual result: -------------- 9223372036854775807 9223372036854775808 4 4 23372036854775807 23372036854775808 3372036854775807 3372036854775807 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=68473&edit=1