#php Array assignment by reference or by value dilemma

array_assignment_by_value.php

<?php

//Array assignment always involves value copying. Use the reference operator to copy an array by reference.
//http://php.net/manual/en/language.types.array.php#example-109

$email = array();
$code = array();

$res = array(
	'email'  => $email //use &$email
	,'code'  => $code //use &$code
);

echo "before update";
print_r($res);

$email = array('status' => 'ok');
$code = array('status' => 'err');

echo "after update";
print_r($res); //this will output "email" key of $res as empty becuase it was assigned by value during init in line 7 not by reference