Doc #77202 [NEW]: DateInterval compare unpredictable result

From: thomas dot wanka at gmx dot net Operating system: Linux PHP version: 7.2.12 Package: Date/time related Bug Type: Documentation Problem Bug description:DateInterval compare unpredictable result Description: ------------ The result if compare operator on two DateInterval objects is unpredictable. See code in the "test script" section: the result of the if() statement depends on the code before. If, for instance, you print the DateInterval, the internal structure seems to change, and the result is correct. Otherwise, the result is not correct. The system should output an error or a warning if the compare operater is not fully implemented. Test script: --------------- <?php $old = DateTime::createFromFormat('Y-m-d H:i:s', '2018-11-26 09:29:00'); // constant here for demo only, i read datetime field from database $now = new DateTime('now',new DateTimeZone('Europe/Berlin')); $maxdiff = new DateInterval('PT30M'); $actualDiff = $now->diff($old); // echo "<pre>"; print_r($now); echo "</pre><br />"; // echo "<pre>"; print_r($maxdiff ); echo "</pre><br />"; if ($actualDiff>$maxDiff) echo "time is up" else echo "just wait"; ?> Expected result: ---------------- throw an error if an nvalid operator ist used minimum request: add information about this behauviour into documentation of DateInterval Actual result: -------------- operator is performed, result is unpredictable -- Edit bug report at https://bugs.php.net/bug.php?id=77202&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=77202&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=77202&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=77202&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=77202&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=77202&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=77202&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=77202&r=needscript Try newer version: https://bugs.php.net/fix.php?id=77202&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=77202&r=support Expected behavior: https://bugs.php.net/fix.php?id=77202&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=77202&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=77202&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=77202&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77202&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=77202&r=dst IIS Stability: https://bugs.php.net/fix.php?id=77202&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=77202&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=77202&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=77202&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=77202&r=mysqlcfg