#37234 [NEW]: unpack() hex problem

From: phpbug at drque dot net Operating system: Linux, Debian 2.6.8-3-k7 PHP version: 5.1.2 PHP Bug Type: Unknown/Other Function Bug description: unpack() hex problem Description: ------------ When unpacking hex with 'unpack', a "0" is appended to the end of the resulting string. This did not happen in previous versions (this code functions in PHP 5.1.1). A quick fix can be done by commenting out line 695 in "ext/standard/pack.c": Change len -= argb % 2; to //len -= argb % 2; This line is one of 6 differences in "pack.c" between version 5.1.1 and 5.1.2. I wasn't able to understand why the "len -= argb %2" line was added. Reproduce code: --------------- <?php $HexString = 'c45dc988443fa8fff52ce7953bf049b8'; $PackedHexString = pack( "h*" , $HexString ); $UnpackedHex = unpack( "h*Hex" , $PackedHexString ); $UnpackedHex = $UnpackedHex[ 'Hex' ]; echo "$HexString\n"; echo "$UnpackedHex\n"; ?> Expected result: ---------------- c45dc988443fa8fff52ce7953bf049b8 c45dc988443fa8fff52ce7953bf049b8 Actual result: -------------- c45dc988443fa8fff52ce7953bf049b8 c45dc988443fa8fff52ce7953bf049b80 -- Edit bug report at http://bugs.php.net/?id=37234&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=37234&r=trysnapshot44 Try a CVS snapshot (PHP 5.1): http://bugs.php.net/fix.php?id=37234&r=trysnapshot51 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=37234&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=37234&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=37234&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=37234&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=37234&r=needscript Try newer version: http://bugs.php.net/fix.php?id=37234&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=37234&r=support Expected behavior: http://bugs.php.net/fix.php?id=37234&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=37234&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=37234&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=37234&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=37234&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=37234&r=dst IIS Stability: http://bugs.php.net/fix.php?id=37234&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=37234&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=37234&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=37234&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=37234&r=mysqlcfg