Bug #75664 [Com]: sprintf %u results in 0 for numbers with more digits than PHP_INT_MAX

Edit report at https://bugs.php.net/bug.php?id=75664&edit=1 ID: 75664 Comment by: erik at evanv dot nl Reported by: erik at evanv dot nl Summary: sprintf %u results in 0 for numbers with more digits than PHP_INT_MAX Status: Not a bug Type: Bug Package: Strings related Operating System: linux 4.14.4 PHP Version: 7.2.0 Assigned To: cmb Block user comment: N Private report: N New Comment: I hope you can consider adding an error for this. Silently overflowing to zero is not something you expect to be possible in a managed language. This behavior caused data corruption in my company's product. I was certain it was caused by a C program we were using but to my surprise it was this. Previous Comments: ------------------------------------------------------------------------ [2017-12-11 15:25:06] cmb@php.net Actually, this boils down to (int) (PHP_INT_MAX*2) being undefined[1], so this is not a bug. [1] <http://www.php.net/manual/en/language.types.integer.php#language.types.integer.casting.from-float> ------------------------------------------------------------------------ [2017-12-10 23:35:07] erik at evanv dot nl Description: ------------ Code speaks for itself. This can lead to data corruption. A decent solution would be to display unknown least significant digits as 0 just like %f. Alternative would be an ArithmeticError. Test script: --------------- php > $var = PHP_INT_MAX * 2; php > echo sprintf("%f", $var); 18446744073709551616.000000 php > echo sprintf("%u", $var); 0 Expected result: ---------------- 18446744073709551616 Actual result: -------------- 0 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=75664&edit=1