Bug #75839 [NEW]: Undefined relation when objects compared

From: csongor at halmai dot hu Operating system: PHP version: Irrelevant Package: *General Issues Bug Type: Bug Bug description:Undefined relation when objects compared Description: ------------ When I compare two obejcts from two different but identially-looking classes then the comparison operators yield contradicting results. In the samle code below, there are two variables $a and $b which are not in ==, nor in === nor in <= nor in >= relationship. Moreover, the spaceship operator tells that $a>$b and $b>$a as well. Test script: --------------- error_reporting(E_ALL); class Objy_1 { public $v =1; } class Objy_2 { public $v =2; } $a = new Objy_1(); $b = new Objy_2(); var_dump($a < $b); // false var_dump($a > $b); // false var_dump($a == $b); // false var_dump($a === $b); // false var_dump($a <=> $b); // false var_dump($a <=> $b); // 1 which means $a > $b var_dump($b <=> $a); // 1 which means $b > $a Expected result: ---------------- I would expect non-contradicting results. In this concrete cases, I think $a == $b should be true, $a <=> $b and $b <=> $a should be 0. Moreover, I think it would be nice to get a warning if I want to compare objects from different classes. -- Edit bug report at https://bugs.php.net/bug.php?id=75839&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=75839&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=75839&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=75839&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=75839&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=75839&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=75839&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=75839&r=needscript Try newer version: https://bugs.php.net/fix.php?id=75839&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=75839&r=support Expected behavior: https://bugs.php.net/fix.php?id=75839&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=75839&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=75839&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=75839&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=75839&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=75839&r=dst IIS Stability: https://bugs.php.net/fix.php?id=75839&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=75839&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=75839&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=75839&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=75839&r=mysqlcfg