Bug #80796 [Opn->Fbk]: decbin errors out on 32-bit PHP installs with "negative" numbres

Edit report at https://bugs.php.net/bug.php?id=80796&edit=1 ID: 80796 Updated by: requinix@php.net Reported by: terrafrost@php.net Summary: decbin errors out on 32-bit PHP installs with "negative" numbres -Status: Open +Status: Feedback Type: Bug Package: Math related Operating System: Windows 10 PHP Version: 8.0.2 Block user comment: N Private report: N New Comment: It already does allow floats - when they can be converted to integers without loss. Allowing all floats won't work because larger and larger values have less and less precision in the least-significant bits, and that means "incorrect" outputs. Previous Comments: ------------------------------------------------------------------------ [2021-02-24 16:38:55] terrafrost@php.net Description: ------------ decbin(float(0xFFFFFFFF)) produces an error on 32-bit PHP 8 installs but decbin(float(0x7FFFFFFF)) doesn't. On 32-bit installs 0xFFFFFFFF is outside the range of a signed 32-bit integer so it can't be represented as anything other than a float but still... I wonder if maybe allowing for floats might not be a bad idea? This is, in particular, an issue on Raspberry Pi's. I mean if it's intended behavior that's cool too - just seems like it could be an oversight. Test script: --------------- <?php echo decbin(floatval(0xFFFFFFFF)) . "\n"; // errors out on PHP 8; works fine on PHP 7.4 echo decbin(floatval(0x7FFFFFFF)) . "\n"; // works fine on PHP 8 and PHP 7.4 Expected result: ---------------- 11111111111111111111111111111111 Actual result: -------------- Fatal error: Uncaught TypeError: decbin(): Argument #1 ($num) must be of type int, float given ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80796&edit=1