dynamically changing array in foreach

Question

is it possible somehow change array which is processed by foreach? I tried this script

$iterator = 10;
$cat = array(1 => \'a\',2 => \'b\',3 => \'c\');

         


        

Answer 1

 'a',2 => 'b',3 => 'c');

foreach ($cat as $k => &$c)//observe the '&'
{
    if ($iterator < 15)
    {
        $cat[$iterator] = $iterator;
        $iterator++;
    }
    echo $c;
} 
?>