ID: 41237 Comment by: lombard-marc at wanadoo dot fr Reported By: victorepand at gmail dot com Status: No Feedback Bug Type: Math related Operating System: Linux PHP Version: 5.2.1 New Comment:
Same bug happens on my production server PHP 5.2.0-8 on Linux It is ok on the development server PHP 5.2.6 on Windows. Impacts blowfish algorithms (2 servers get different results) Previous Comments: ------------------------------------------------------------------------ [2008-02-29 21:53:51] dochoncho at gmail dot com Reproduced using PHP/5.2.3-1ubuntu6.3 What fun. ------------------------------------------------------------------------ [2007-08-29 09:22:22] php dot ydyoda at spamgourmet dot com For information: Same bug on PHP 4.3.11 But no probleme with PHP 4.3.5 ------------------------------------------------------------------------ [2007-05-08 01:00:01] php-bugs at lists dot php dot net No feedback was provided for this bug for over a week, so it is being suspended automatically. If you are able to provide the information that was originally requested, please do so and change the status of the bug back to "Open". ------------------------------------------------------------------------ [2007-04-30 13:09:45] [EMAIL PROTECTED] Please try using this CVS snapshot: http://snaps.php.net/php5.2-latest.tar.gz For Windows: http://snaps.php.net/win32/php5.2-win32-latest.zip ------------------------------------------------------------------------ [2007-04-30 09:15:07] victorepand at gmail dot com Description: ------------ I am finding a difference between the same bitwise arithmetic from one server to the next when using PHP. What's more, this bitwise arithmetic is necessary for the PHP script to run, so as a result it will only function on one server, but not the other. Here is an example I am using to demonstrate this: if ((43814 ^ -4738698913)!=-443704711) print "incorrect result"; else print "correct result"; The (^) operator is an XOR bitwise arithmetic function as shown here: http://us2.php.net/manual/en/language.operators.bitwise.php and I am required to use numbers like the ones shown. On one server, I have tried both PHP 4.4.0 and PHP 5.1.0RC1 and the math works correctly for both (the correct answer as shown above is -443704711). But on another server, I have tried the same math with both PHP 4.4.6 and PHP 5.2.1, and it does not work correctly with either version of PHP! The result I get at that server is: -2147439834. I have no idea what could be the problem, but I can show you the PHP Info for both servers and perhaps you can detect what might be the difference? Here is the PHP Info for the server that works correctly using PHP 5.1.0RC1: http://www.buycellularphones.info/cron/special/info.php Here is the PHP Info for the other server using PHP 5.2.1 that does not work correctly: http://www.customdesignpostcards.com/cron/special/info.php Reproduce code: --------------- if ((43814 ^ -4738698913)!=-443704711) print "incorrect result"; else print "correct result"; Expected result: ---------------- correct result Actual result: -------------- incorrect result ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=41237&edit=1
