数组或Json转换为字符串

Question

将字符串更改为

$string = '[{"name":"jack","address":"who knows"},{"name":"jill","address":"who knows too"}]';

$array = json_decode($array,true);

但是如果反向将数组更改为字符串怎么办

$array = [{"name":"jack","address":"who knows"},{"name":"jill","address":"who knows too"}];

$string = $array; // $string is $string like on first example