#44552 [NEW]: $this can be overwritten by setting a reference

From: andre at webkr dot de Operating system: Tested on Windows and Linux PHP version: 5.2.5 PHP Bug Type: Feature/Change Request Bug description: $this can be overwritten by setting a reference Description: ------------ Usually $this cannot be set. But by creating a reference to $this it can. In the example the reference is created by the =& operator. The problem is also valid when passing $this to a function by reference. I think an error should be generated because both $this = 1 and $this =& $x do generate an error. Reproduce code: --------------- class testclass { function foo() { var_dump($this); // object(testclass)#1 (0) { } $this->bar(); var_dump($this); // object(testclass)#1 (0) { } } function bar() { $a =& $this; $a = 1; var_dump($this); // int(1) } } $b = new testclass; $b->foo(); Expected result: ---------------- Fatal error: Cannot re-assign $this in eval()'d code on line 12 Actual result: -------------- object(testclass)#1 (0) { } int(1) object(testclass)#1 (0) { } -- Edit bug report at http://bugs.php.net/?id=44552&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=44552&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=44552&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=44552&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=44552&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=44552&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=44552&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=44552&r=needscript Try newer version: http://bugs.php.net/fix.php?id=44552&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=44552&r=support Expected behavior: http://bugs.php.net/fix.php?id=44552&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=44552&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=44552&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=44552&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=44552&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=44552&r=dst IIS Stability: http://bugs.php.net/fix.php?id=44552&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=44552&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=44552&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=44552&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=44552&r=mysqlcfg