Description:
------------
The sole argument for the ArrayIterator::append method is listed as a string; however, I have successfully used this method to add arbitrary objects to an ArrayIterator.

Test script:
---------------
<?php
$ai=new ArrayIterator();
$obj=new stdClass;
$obj->a=1;
$ai->append($obj);

echo 'count() == '. $ai->count() .'<br />';

while($ai->valid())
{
	echo 'Object '.$ai->key() .'->a == '. $ai->current()->a.'<br />';
	$ai->next();
}
?>

Expected result:
----------------
count() == 1
Object 0->a == 1