#48272 [Opn->Fbk]: function valid , next, current ..from subclass of FilterIterator return false

[jani]

 ID:               48272
 Updated by:       j...@php.net
 Reported By:      gma625 at msn dot com
-Status:           Open
+Status:           Feedback
 Bug Type:         SPL related
 Operating System: windows xp2
-PHP Version:      5.2.9
+PHP Version:      5.2.6
 New Comment:

Please try using this CVS snapshot:

  http://snaps.php.net/php5.2-latest.tar.gz
 
For Windows:

  http://windows.php.net/snapshots/




Previous Comments:
------------------------------------------------------------------------

[2009-05-14 03:44:17] gma625 at msn dot com

hello, I'm the reporter of this bug, I'm sorry for making a typing
mistake below, I just get up to fix this typing mistake , But I don't
know how to achieve , so I post a new comment here, sorry for the
inconvience again . 

mistake:

and the result is bool(true), it's very strange to get this while we
$cull->valid() it return false(true)

fix: 


and the result is bool(true), it's very strange to get this while we
$cull->valid() it return bool(false)

------------------------------------------------------------------------

[2009-05-14 03:39:08] gma625 at msn dot com

Description:
------------
When extends a class with FilterIterator, the valid ,current,key, next
functions can't work, until you override your function with the
following codes
public function valid() {
     $this->getInnerIterator()->valid();  
}

btw, my php works version is 5.2.6, I can't found this version in the
select list , so I selected 5.2.9

Reproduce code:
---------------
error_reporting ( E_ALL | E_STRICT );
$array = array ('koala', 'kangaroo', 'wombat', 'wallaby', 'emu', 'NZ'
=> 'kiwi', 'kookaburra', 'platypus' );

class CullingIterator extends FilterIterator {
        
        public function __construct(Iterator $it) {
                parent::__construct ( $it );
        }
        
        function accept() {
                $ittmp = $this->getInnerIterator ();
                if ($ittmp->current () == 'koala') {
                        return false;
                }
                return true;
        }
}

$cull = new CullingIterator ( new ArrayIterator ( $array ) );

try {
        while ( $cull->valid () ) {
                echo $cull->current ();
                $cull->next ();
        }
} catch ( Exception $e ) {
        $e->getTraceAsString ();
}

Expected result:
----------------
print out the array result as following
kangaroowombatwallabyemukiwikookaburraplatypus


Actual result:
--------------
print nothing, becuase when we call $cull->valid() will return false

additional information , I've also tracked this problem by the
following code, 

$cull = new CullingIterator ( new ArrayIterator ( $array ) );

$it = $cull->getInnerIterator();

var_dump( $it->valid() );

and the result is bool(true), it's very strange to get this while we
$cull->valid() it return false(true)


------------------------------------------------------------------------


-- 
Edit this bug report at http://bugs.php.net/?id=48272&edit=1