note 56382 added to language.operators.bitwise

Perl vs. PHP implementation of the ^ operator: After attempting to translate a Perl module into PHP, I realized that Perl's implementation of the ^ operator is different than the PHP implementation. By default, Perl treats the variables as floats and PHP as integers. I was able to verify the PHP use of the operator by stating "use integer;" within the Perl module, which output the exact same result as PHP was using. The logical decision would be to cast every variable as (float) when using the ^ operator in PHP. However, this will not yield the same results. After about a half hour of banging my head against the wall, I discovered a gem and wrote a function using the binary-decimal conversions in PHP. /* not having much experience with bitwise operations, I cannot tell you that this is the BEST solution, but it certainly is a solution that finally works and always returns the EXACT same result Perl provides. */ function binxor($a, $b) { return bindec(decbin((float)$a ^ (float)$b)); } //normal PHP code will not yeild the same result as Perl $result = 3851235679 ^ 43814; //= -443704711 //to get the same result as Perl $result = binxor(3851235679, 43814); //= 3851262585 //YIPPEE!!! //to see the differences, try the following $a = 3851235679 XOR 43814; $b = 3851235679 ^ 43814; //integer result $c = (float)3851235679 ^ (float)43814; //same as $b $d = binxor(3851235679, 43814); //same as Perl!! echo("A: $a<br />"); echo("B: $b<br />"); echo("C: $c<br />"); echo("D: $d<br />"); ---- Manual Page -- http://www.php.net/manual/en/language.operators.bitwise.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+56382 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+56382&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+56382&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+56382&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+56382&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+56382&report=yes&reason=non-english Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+56382&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+56382&report=yes Search -- http://master.php.net/manage/user-notes.php