From: henson dot garth at gmail dot com
Operating system: Linux
PHP version: 5.2.1
PHP Bug Type: Math related
Bug description: Increment/Decrement operator calculation oddity
Description:
------------
The increment/decrement operators seem to calculate out of order compared
to other languages and even previous versions of PHP. I compared this
report numerous times against a 4.3.11 install that I am running to verify
the inconsistency. In the case of PHP 5.2.x, the increment operator seems
to be processed in an inappropriate order to the rest of the statement. In
4.3.11, everything is presented just as expected (as my Expected results
display below).
Reproduce code:
---------------
$a = array(); // Begin Test 1
$b = 0;
$a[$b++] = $b;
var_dump($a);
$a = array(); // Begin Test 2
$b = 0;
$a[$b] = $b++;
var_dump($a);
$a = array(); // Begin Test 3
$b = 10;
$a[$b--] = $b;
var_dump($a);
$a = array(); // Begin Test 4
$b = 10;
$a[$b] = $b--;
var_dump($a);
Expected result:
----------------
array(1){[0] => int(1)}
array(1){[0] => int(0)}
array(1){[10] => int(9)}
array(1){[10] => int(10)}
Actual result:
--------------
array(1){[0] => int(1)}
array(1){[1] => int(0)}
array(1){[10] => int(9)}
array(1){[9] => int(10)}
--
Edit bug report at http://bugs.php.net/?id=40755&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=40755&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=40755&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=40755&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=40755&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=40755&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=40755&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=40755&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=40755&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=40755&r=support
Expected behavior: http://bugs.php.net/fix.php?id=40755&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=40755&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=40755&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=40755&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=40755&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=40755&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=40755&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=40755&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=40755&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=40755&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=40755&r=mysqlcfg
