// a complex array
$var = array(
	'pozdrav',
	433,
	array(1,'niz u nizu'),
	'prvi niz'
);

//konvertovanje u string
$string = serialize($var);

echo $string;
//nazad u variable
$nova_var = unserialize($string);

print_r($nova_var) . "<br>";
echo $nova_var[0] . "<br>";
echo $nova_var[2][1] . "<br>";