ID: 41623
User updated by: amine dot abbes at gmail dot com
Reported By: amine dot abbes at gmail dot com
Status: Bogus
Bug Type: Class/Object related
Operating System: windows XP
PHP Version: 5.2.3
New Comment:
There is an issue because the members (vars) refere to the class
englobing "$this" but the functions refere to the caller class.
Please check with this code :
<?php
class MyParent{
private $var = "varMyParent";
function __construct(){
echo "\$this is an instance of MyClass : " . (($this instanceof
MyClass)?"Yes":"No") . "<br>" ;
echo "Calling \$this->myfunction() in MyParent : ";
$this->myfunction();
echo "\$this->var in MyParent = " . $this->var . "<br>";
}
function myfunction(){
//echo (($this instanceof MyClass)?"Yes":"No") . " in myfunction
MyParent<br>" ;
echo __METHOD__ . " - \$this->var = " . $this->var . "<br>";
}
}
class MyClass extends MyParent{
private $var = "varMyClass";
function __construct(){
parent::__construct();
echo "\$this->var in MyClass = " . $this->var . "<br>";
}
function myfunction(){
echo __METHOD__ . " - \$this->var = " . $this->var . "<br>";
}
}
new MyClass();
?>
Result :
$this is an instance of MyClass : Yes
Calling $this->myfunction() in MyParent : MyClass::myfunction -
$this->var = varMyClass
$this->var in MyParent = varMyParent
$this->var in MyClass = varMyClass
=> conclusion :
In subclass MyClass inherited from MyParent, $this in
parent::__construct() code block has diffrent visibility of variables
and functions. The functions will continue to refere to MyClass and the
variables will refere to MyParent.
This is ambiguous for the developers and should be fixed.
Previous Comments:
------------------------------------------------------------------------
[2007-06-07 10:20:51] [EMAIL PROTECTED]
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php
------------------------------------------------------------------------
[2007-06-07 10:14:58] amine dot abbes at gmail dot com
Description:
------------
When calling parent::__construct() in the subclass constructor, $this
will refere to the subclass instance.
Reproduce code:
---------------
<?php
class MyParent{
function __construct(){
echo (($this instanceof MyClass)?"Yes":"No") . "<br>" ;
self::myfunction();
$this->myfunction();
}
function myfunction(){
echo __METHOD__ . "<br>";
}
}
class MyClass extends MyParent{
function __construct(){
parent::__construct();
}
function myfunction(){
echo __METHOD__ . "<br>";
}
}
new MyClass();
?>
Expected result:
----------------
No
MyParent::myfunction
MyParent::myfunction
Actual result:
--------------
Yes
MyParent::myfunction
MyClass::myfunction
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=41623&edit=1
