Bug #63510 [Asn->Opn]: Integer overflow with chr

Edit report at https://bugs.php.net/bug.php?id=63510&edit=1 ID: 63510 Updated by: yohgaki@php.net Reported by: idokan at gmail dot com Summary: Integer overflow with chr -Status: Assigned +Status: Open Type: Bug Package: Strings related PHP Version: 5.4.8 Assigned To: yohgaki Block user comment: N Private report: N Previous Comments: ------------------------------------------------------------------------ [2012-11-14 15:36:32] idokan at gmail dot com Huh ?! ASCII is 0..127 chars, if they are out of range and also from extended ASCII (128..255), then you must report an error like with normal implementation such as Ruby, Python, Pascal, Perl (with strict bytes) etc... Not to $value & 255 it. ------------------------------------------------------------------------ [2012-11-14 15:28:28] laruence@php.net I think this check could be done in user script self. the document said: chr convert *ascii* code .. so... ------------------------------------------------------------------------ [2012-11-14 09:36:12] idokan at gmail dot com Description: ------------ The chr function translate a single Byte length integer into it's ASCII value. When providing a number bigger then 255, it returns the first byte instead of reporting an error about being out of range. Test script: --------------- echo chr(1000) . ' ' . ord(chr(1000)) . "\n"; Expected result: ---------------- chr must check the numeric boundaries and report on on an error when they are out of the range. Actual result: -------------- returns the first byte out of the result, making it appear like an integer overflow that the carry flag exception was captured. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=63510&edit=1