ID: 37212
Updated by: [EMAIL PROTECTED]
-Summary: Protected variables not always accessible between
sub-classes
Reported By: andreasblixt at msn dot com
Status: Assigned
Bug Type: Class/Object related
Operating System: *
-PHP Version: 5.1.4
+PHP Version: 5.1.*
Assigned To: helly
New Comment:
Fix requies API change so it is not doable in 5.1.
Previous Comments:
------------------------------------------------------------------------
[2006-05-27 01:40:49] [EMAIL PROTECTED]
The problem is that right now struct property_info does not know where
the property was declared. Thus what the engine sees is B accessing
some protected property in C. The fix seems however quite easy. I'll
give it a try.
------------------------------------------------------------------------
[2006-05-05 19:03:33] [EMAIL PROTECTED]
Probably a missing check if the property was declared in a common
parent class?
------------------------------------------------------------------------
[2006-04-27 19:39:38] crescentfreshpot at yahoo dot com
Odd. Here is a complete example.
<?php
class A {
protected $value;
public function __construct($val) {
$this->value = $val;
}
public function copyValue($obj) {
$this->value = $obj->value;
}
protected function getValue() {
return $this->value;
}
}
class B extends A {
public function copyValue($obj) {
$this->value = $obj->getValue(); // this works
$this->value = $obj->value; // this is fatal
}
}
class C extends A {}
$B = new B("Value from B");
$C = new C("Value from C");
$B->copyValue($C);
?>
Strange that the method call works but the property access doesn't.
Both are protected.
------------------------------------------------------------------------
[2006-04-27 15:41:26] andreasblixt at msn dot com
The property is not being redeclared in C, though. It is still a
property of A, structure-wise. A method declared and called in the same
way as the property does not cause any error. Here's a simple non-code
example:
protected method() is declared in A.
protected $property is declared in A.
B and C both extend A.
Method in B tries to access $C->property [FATAL ERROR]
Method in B tries to access $C->method() [No error]
One could even make method() return $this->property which would not
cause an error either. It would be expected that both the property and
method would have the same visibility when declared in the same class.
------------------------------------------------------------------------
[2006-04-27 15:02:13] crescentfreshpot at yahoo dot com
Here is simplified reproduce code:
<?php
class A {
protected $value;
public function __construct($val) {
$this->value = $val;
}
public function copyValue($obj) {
$this->value = $obj->value;
}
}
class B extends A {
public function copyValue($obj) {
$this->value = $obj->value;
}
}
class C extends A {}
$B = new B("Value from B");
$C = new C("Value from C");
$B->copyValue($C); // fatal
var_dump($B);
?>
I'm not sure that this is a bug. Class B's copyValue() is trying to
access a protected member of Class C, which is not in B's chain of
inheritance.
------------------------------------------------------------------------
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/37212
--
Edit this bug report at http://bugs.php.net/?id=37212&edit=1
