Description:
------------
After a foreach() on an array, key() won't return a value from the same array.

It looks like an internal array pointer problem, since a reset() before key() appears to fix it.

Reproduce code:
---------------
<?php

$foo = array('a'=>'1', 'b'=>'2', 'c'=>'3');

foreach($foo as $k=>$v)
{

	echo "$k=>$v\n";
	
}
// reset($foo); // this fixes the problem
echo key($foo);

?>



Expected result:
----------------
a=>1
b=>2
c=>3
a

Actual result:
--------------
a=>1
b=>2
c=>3