Bug #66670 [NEW]: property_exist cannot find private properties defined in superclass

From: mpope at homeimprovementleads dot com Operating system: windows 7 PHP version: 5.5.9 Package: Class/Object related Bug Type: Bug Bug description:property_exist cannot find private properties defined in superclass Description: ------------ Despite reporting as fixed ( https://bugs.php.net/bug.php?id=50810 ) and closed in 5.3.3 according to the change log, a small variation in the logic still produces a bug in 5.5.9. The fix in 50810 only worked because the method checking the private property was in the same class as the private property. If you attempt to check the private property of a superclass from the subclass it reports false. Although I would normally expect this behavior, I think it is counter to the statement found in the docs for property_exists in the change log section: "5.3.0 This function checks the existence of a property independent of accessibility." Test script: --------------- <?php function check_scope($ref) { echo "vs\n"; var_dump(property_exists($ref, 'foo')); var_dump(property_exists($ref, 'goo')); var_dump(property_exists($ref, 'poo')); echo "\n"; } class a { private $foo; public function __construct() { var_dump(property_exists($this, 'foo')); var_dump(property_exists($this, 'goo')); var_dump(property_exists($this, 'poo')); check_scope($this); } } class b extends a { private $goo; public function __construct() { var_dump(property_exists($this, 'foo')); var_dump(property_exists($this, 'goo')); var_dump(property_exists($this, 'poo')); check_scope($this); parent::__construct(); } } class c extends b { private $poo; public function __construct() { var_dump(property_exists($this, 'foo')); var_dump(property_exists($this, 'goo')); var_dump(property_exists($this, 'poo')); check_scope($this); parent::__construct(); } } new c(); Expected result: ---------------- Given the accessibility consideration I would expect property_exists to return true in all of the cases outlined in the test script. However, running the script will show that property existence checks depend on both the location of the private variable definition AND the location of the property_exists method call. The results in the check_scope() method do not match the results of the same logic copy and pasted into each constructor method. Actual result: -------------- bool(false) bool(false) bool(true) vs bool(false) bool(false) bool(true) bool(false) bool(true) bool(true) vs bool(false) bool(false) bool(true) bool(true) bool(false) bool(true) vs bool(false) bool(false) bool(true) -- Edit bug report at https://bugs.php.net/bug.php?id=66670&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=66670&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=66670&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=66670&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=66670&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=66670&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=66670&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=66670&r=needscript Try newer version: https://bugs.php.net/fix.php?id=66670&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=66670&r=support Expected behavior: https://bugs.php.net/fix.php?id=66670&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=66670&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=66670&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=66670&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=66670&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=66670&r=dst IIS Stability: https://bugs.php.net/fix.php?id=66670&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=66670&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=66670&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=66670&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=66670&r=mysqlcfg