Description:
------------
If I use current/next/prev/key() on the same array as foreach() is currently looping over the internal pointer is only increased on the first iteration.

However. If I compare the value ($b) to something before using current/next/prev/key() I get the expected results:

$a = range(0, 10);
foreach($a as $b) {
    if($b == 5) {
        var_dump(current($a)); // int(6)
    }
}



Reproduce code:
---------------
<?php
$a = range(0, 10);
foreach($a as $b) {
    var_dump(current($a));
    if($b == 5) {
        var_dump(current($a));
    }
}

Expected result:
----------------
int(1)
int(2)
int(3)
int(4)
int(5)
int(6) // The var_dump() inside the if()
int(6)
int(7)
int(8)
int(9)
int(10)
bool(false) // Since the internal pointer points beyond the end


Actual result:
--------------
int(1)
int(1)
int(1)
int(1)
int(1)
int(1)
int(1)
int(1)
int(1)
int(1)
int(1)
int(1)