主从结构的json要怎么分拆
$a='{head:{id:4,userno:12345,username:cdz1},body:[{orderno:1,price:15.00,qty:1},{orderno:1,price:9.00,qty:1}]}';
这样的一段jsoin,  我要单独取得head 部分的字段值及body 部份的字段值， 比如取 head 部份的 userno,及 body 部份的 price.
------解决思路----------------------
从这样的数组中都不会取出想要的数据，你的老师该打屁股了array (
'head' => array (
'id' => '4',
'userno' => '12345',
'username' => 'cdz1',
),
'body' => array (
0 => array (
'orderno' => '1',
'price' => '15.00',
'qty' => '1',
),
1 => array (
'orderno' => '1',
'price' => '9.00',
'qty' => '1',
),
),
)
------解决思路----------------------
head->userno;
echo '
price:'.$obj->body[0]->price;
/////或：
echo
;
$ary=json_decode($a,true);
echo 'userno:'.$ary['head']['userno'];
echo '
price:'.$ary['body'][0]['price'];
?>