#45297 [NEW]: Problem when comparing casted strings

From: wittstruck at mediafinanz dot de Operating system: Windows XP PHP version: 5.2.6 PHP Bug Type: Strings related Bug description: Problem when comparing casted strings Description: ------------ I'm casting a string to a double; afterwards the casted result does differ from the original string, but comparing them does not work properly and leads to a wrong bool. strcmp works, though. Reproduce code: --------------- <?php $stringAmount = '2008-06-13 14:24:00'; $doubleAmount = (double) $stringAmount; echo 'doubleAmount: ' . $doubleAmount . ' stringAmount: ' . $stringAmount; if ($doubleAmount != $stringAmount) { echo '<br/>' . $doubleAmount . ' is not equal to' . $stringAmount; } else { echo "<br/> both are equal"; } ?> Expected result: ---------------- doubleAmount: 2008 stringAmount: 2008-06-13 14:24:00 2008 is not equal to2008-06-13 14:24:00 Actual result: -------------- doubleAmount: 2008 stringAmount: 2008-06-13 14:24:00 both are equal -- Edit bug report at http://bugs.php.net/?id=45297&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=45297&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=45297&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=45297&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=45297&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=45297&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=45297&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=45297&r=needscript Try newer version: http://bugs.php.net/fix.php?id=45297&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=45297&r=support Expected behavior: http://bugs.php.net/fix.php?id=45297&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=45297&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=45297&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=45297&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=45297&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=45297&r=dst IIS Stability: http://bugs.php.net/fix.php?id=45297&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=45297&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=45297&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=45297&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=45297&r=mysqlcfg