json_encode
$arr = array("name"=>"benben");
echo json_encode($arr);
//{"name":"benben"}
echo $arr['name'];
//benben
json_decode
$js = '{"name":"benben"}';
$arr = json_decode($js);
print_r($arr);
//stdClass Object ( [name] => benben )
echo $arr->name;
//benben
json_decode true
$js = '{"name":"benben"}';
$arr = json_decode($js,true);
print_r($arr);
//Array ( [name] => benben )
echo $arr['name'];
//benben
