Bug #70517 [NEW]: isset() on string produces invalid result

From: jens dot rosenthal at compcom dot de Operating system: PHP version: 5.5.29 Package: Arrays related Bug Type: Bug Bug description:isset() on string produces invalid result Description: ------------ Taking the example (#2) from the documentation page of the isset-function (Example #2 isset() on String Offsets), and modifying the test to contain [0] references somewhere along the array path, you can see, that each of these references provide a 'true' result, despite this is clearly not correct (see attached script), since the first part of the array patch does not exist (so any subsequent path cannot exist either). Test script: --------------- <?php $expected_array_got_string = 'einstring'; var_dump(isset($expected_array_got_string['und'])); var_dump(isset($expected_array_got_string['und'][0])); var_dump(isset($expected_array_got_string['und'][0]['test'])); var_dump(isset($expected_array_got_string['und']['test'][1])); var_dump(isset($expected_array_got_string['und']['test'][0])); ?> Expected result: ---------------- bool(false) bool(false) bool(false) bool(false) bool(false) Actual result: -------------- bool(false) bool(true) bool(false) bool(false) bool(true) -- Edit bug report at https://bugs.php.net/bug.php?id=70517&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=70517&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=70517&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=70517&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=70517&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=70517&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=70517&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=70517&r=needscript Try newer version: https://bugs.php.net/fix.php?id=70517&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=70517&r=support Expected behavior: https://bugs.php.net/fix.php?id=70517&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=70517&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=70517&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=70517&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=70517&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=70517&r=dst IIS Stability: https://bugs.php.net/fix.php?id=70517&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=70517&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=70517&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=70517&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=70517&r=mysqlcfg