Different between &$DataRow and $DataRow

Posted by KoolKabin on Stack Overflow See other posts from Stack Overflow or by KoolKabin
Published on 2010-05-11T10:52:05Z Indexed on 2010/05/11 11:14 UTC
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hi guys,

I am confused from the result of the following code: I can't get my expected result:

$arrX = array('a'=>array('val'=>10),'b'=>array('val'=>20), 'c'=>array('val'=>30));
foreach( $arrX as &$DataRow )
{
    $DataRow['val'] = $DataRow['val'] + 20;
}
foreach( $arrX as $DataRow )
{
    echo '<br />val: '.$DataRow['val'].'<br/>';
}

Output: 30, 40, 40

Expected: 30, 40, 50

But again if i make small chage it works fine,

$arrX = array('a'=>array('val'=>10),'b'=>array('val'=>20), 'c'=>array('val'=>30));
foreach( $arrX as &$DataRow )
{
    $DataRow['val'] = $DataRow['val'] + 20;
}
foreach( $arrX as &$DataRow )
{
    echo '<br />val: '.$DataRow['val'].'<br/>';
}

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