PHP: Enviar array con POST

gistfile1

<?php  

$aPaises = array();
$aPaises[] = 'Chile';
$aPaises[] = 'Nigeria';
$aPaises[] = 'Ecuador';


?>

<form action="arraysMostrar.php" method="post">

	<input type='hidden' name='paises' value='<?php echo serialize($aPaises); ?>' />
	<input type="submit">
</form>

<?php  
//En el otro documento
print_r(unserialize($_POST['paises'])); 

?>