#25674 [NEW]: increment/decrement inconsistency and error

From: lew at mailduct dot com Operating system: FreeBSD 4.8-REL PHP version: 4.3.3 PHP Bug Type: Math related Bug description: increment/decrement inconsistency and error Description: ------------ There is a gross inconsistency between how the increment and decrement operators function. If you increment an empty variable, the operations works correctly. However, if you *decrement* an empty variable, the operation leaves it unchanged! See for yourself, with my clear example... Reproduce code: --------------- <?php // Increment some blank/empty variables... $pos++; $pos++; $pos++; $neg--; $neg--; $neg--; // Show them to us now... print( "pos = $pos\n" ); print( "neg = $neg\n" ); // Now do it another way (forced typecast)... $ppp += 1; $ppp += 1; $ppp += 1; $nnn -= 1; $nnn -= 1; $nnn -= 1; // Show them to us now... print( "ppp = $ppp\n" ); print( "nnn = $nnn\n" ); # # Expected: # pos = 3 ppp = 3 # neg = -3 nnn = -3 # # Actual: # pos = 3 ppp = 3 # neg = nnn = -3 ?> Expected result: ---------------- # # Expected: # pos = 3 ppp = 3 # neg = -3 nnn = -3 Actual result: -------------- # # Actual: # pos = 3 ppp = 3 # neg = nnn = -3 (note that $neg-- fails!) -- Edit bug report at http://bugs.php.net/?id=25674&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=25674&r=trysnapshot4 Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=25674&r=trysnapshot5 Fixed in CVS: http://bugs.php.net/fix.php?id=25674&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=25674&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=25674&r=needtrace Try newer version: http://bugs.php.net/fix.php?id=25674&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=25674&r=support Expected behavior: http://bugs.php.net/fix.php?id=25674&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=25674&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=25674&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=25674&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=25674&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=25674&r=dst IIS Stability: http://bugs.php.net/fix.php?id=25674&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=25674&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=25674&r=float