Description:
------------
When you loop through an array with foreach and set the value as a pointer to the array value then the last element in the array will be set as a pointer to the second to last element of the array. 

Then if you loop through the array a second time you will see that the last value isn't there, but points to the second to last value. 

Test script:
---------------
<?php

$originalArray = array('Thor', 'The Hulk', 'Iron Man');

var_dump($originalArray);

foreach ($originalArray as &$value) {
	echo $value."\n";
}

echo "\nSecond time through loop\n";

foreach ($originalArray as $value) {
	echo $value."\n";
}

// notice the last element is a pointer which it shouldn't be.
echo "\n".var_dump($originalArray);

Expected result:
----------------
array(3) {
  [0]=>
  string(4) "Thor"
  [1]=>
  string(8) "The Hulk"
  [2]=>
  string(8) "Iron Man"
}
Thor
The Hulk
Iron Man

Second time through loop
Thor
The Hulk
Iron Man
array(3) {
  [0]=>
  string(4) "Thor"
  [1]=>
  string(8) "The Hulk"
  [2]=>
  string(8) "Iron Man"
}

Actual result:
--------------
array(3) {
  [0]=>
  string(4) "Thor"
  [1]=>
  string(8) "The Hulk"
  [2]=>
  string(8) "Iron Man"
}
Thor
The Hulk
Iron Man

Second time through loop
Thor
The Hulk
The Hulk
array(3) {
  [0]=>
  string(4) "Thor"
  [1]=>
  string(8) "The Hulk"
  [2]=>
  &string(8) "The Hulk"
}