Bug #60428 [Opn->Wfx]: $this as byref

Edit report at https://bugs.php.net/bug.php?id=60428&edit=1 ID: 60428 Updated by: johannes@php.net Reported by: bjorn at hcbmedia dot nl Summary: $this as byref -Status: Open +Status: Wont fix Type: Bug Package: *General Issues Operating System: Any PHP Version: 5.3.8 Block user comment: N Private report: N New Comment: This is caused by different optimisations for access to $this we have. The only way we could detect this is by preventing to pass $this by reference, which isn't a good restriction in the language. Afterwards, in your ref method we have no way to figure out that $this was passed. Therefore we all have to live with this. Previous Comments: ------------------------------------------------------------------------ [2011-12-01 15:01:29] bjorn at hcbmedia dot nl Description: ------------ take a look at the following script <?php class B { public $b = 50; public function whoami () { var_dump (__CLASS__); } } class A { public $a = 6; function thisref () { var_dump ($this); // A $this->ref ($this); // exchange $this by a B object var_dump ($this); // B var_dump ($this->a); // 6 var_dump ($this->b); // Notice: Undefined property: A::$b var_dump (isset ($this->a)); // true var_dump (property_exists ($this, "a")); // false var_dump (__CLASS__); // A $this->whoami (); // A var_dump ($this instanceof self ? "A" : "B"); // B } function ref (A &$ref) { $ref = new B(); } public function whoami () { var_dump (__CLASS__); } } $a = new A(); $a->thisref (); ?> it supplies $this variable as a property to a byref function, then changing it to a diffrent type. if gives some strange results Expected result: ---------------- it should not be possible to supply $this as a byref param Actual result: -------------- $this seems to be changed, however any call upon $this seems not, so properties and methods remain unchanged. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=60428&edit=1