Strange php array reference behaviour. [FIXED]

arrays.php

<?php
$array = array('a', 'b', 'c');

foreach($array as $value) {
    echo $value;
}

echo PHP_EOL;

foreach($array as &$value) {
    echo $value;
}
// The fix!
unset($value);

echo PHP_EOL;

foreach($array as $value) {
    echo $value;
}

arrays.txt

abc
abc
abc

Fix is to add unset($value); after each direct value usage.
http://stackoverflow.com/questions/3307409/php-pass-by-reference-in-foreach