ID: 22655
User updated by: stanislav at shramko dot com
Reported By: stanislav at shramko dot com
-Status: Feedback
+Status: Open
Bug Type: Scripting Engine problem
Operating System: WinXP
PHP Version: 4.3.0
New Comment:
I thought that the variable should be unset in the class as well, cause
it was passed into constructor by reference. Also it is disposed in the
global scope so should be removed from everywhere. Now it seems that
the variable is unset in the global scope, not in local ones. Such
behavior of PHP seems not very predicable to me.
The only solution I found is to assign a null value to the variable
manually. It looks like a workaround though, not like the right way to
do things.
Previous Comments:
------------------------------------------------------------------------
[2003-03-12 17:15:41] [EMAIL PROTECTED]
And what did you expect the output to be?
------------------------------------------------------------------------
[2003-03-12 02:15:55] stanislav at shramko dot com
I was very discouraged about the behavior of unset() function with
variables which are
contained in objects in the same time. Also I'm slightly mad about
references to NULL and so on.
<?php
// two test classes
class a
{
var $a = null;
function a( &$b )
{
$this->a = &$b;
}
}
class b
{
var $b = 5;
}
// ---------- the main part ------------
// alas, I need to use destructors
$b = &new b();
$a = &new a( $b );
var_dump( $a ); // checking the object's state
$b->b = 3; // changing it
var_dump( $a ); // Note that value was changed...
unset( $b ); // what are we waiting for?
var_dump( $a ); // but the object's field wasn't affected
$b = null;
var_dump( $a ); // there's no way to destroy this blamed property
echo "------------------------------------------------------------\n";
// but in case if we will try to assign a null value to this field
whilst
// the object is in it's initial state, we're getting another results
$b = &new b();
$a = &new a( $b );
var_dump( $a );
$b->b = 3;
var_dump( $a ); // Note that value was changed...
$b = null;
var_dump( $a ); // I see, it's a great way to dispose a field of an
object :)
// this reference to NULL looks pretty well, isn't it? :)
?>
I've lost the sence of the whole situation at this point.
Regards,
Stanislav.
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=22655&edit=1
