From: stanislav at shramko dot com
Operating system: WinXP
PHP version: 4.3.0
PHP Bug Type: Class/Object related
Bug description: problems with unset
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 bug report at http://bugs.php.net/?id=22655&edit=1
--
Try a CVS snapshot: http://bugs.php.net/fix.php?id=22655&r=trysnapshot
Fixed in CVS: http://bugs.php.net/fix.php?id=22655&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=22655&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=22655&r=needtrace
Try newer version: http://bugs.php.net/fix.php?id=22655&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=22655&r=support
Expected behavior: http://bugs.php.net/fix.php?id=22655&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=22655&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=22655&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=22655&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=22655&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=22655&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=22655&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=22655&r=gnused
