get傳值 (數組) JSON.stringify()和toString()的區別

var arr = [1,2,3,4];
 console.log(arr.toString()); //  1,2,3,4

 arr.toString()是將數組轉化成字符串，因此不帶 [ ]

 alert(JSON.stringify(arr));
 console.log(JSON.stringify(arr)); //  [1,2,3,4]

 而JSON.stringify(arr)是從一個對象解析出JSON字符串，是帶[]的

 

eg:
js中
CACHEARR arr

1. (3) ["97400923484918563", "97400923484918559", "97400923484327859"]
1. 0:"97400923484918563"
2. 1:"97400923484918559"
3. 2:"97400923484327859"

var listArr = window.JSON.stringify(CACHEARR);
=>string ["97400923484918563","97400923484918559","97400923484327859"]

window.location.href= ('./pickList.php?listArr='+listArr);

php中
$listArr = $_GET['listArr'];
df($listArr);

string

 '["97400923484918563","97400923484918559","97400923484327859"]' (length=61)

$array = json_decode($listArr);
df($array);die;

array (size=3)
  0 => string  '97400923484918563' (length=17);   1 => string '97400923484918559' (length=17);  2 => string '97400923484327859' (length=17)

 

 另外JSON.parse() 是用於從一個字符串中解析出json對象

 var str = '{"name":"huangxiaojian","age":"23"}'

結果：

JSON.parse(str)

 

Object

1. age: "23"
2. name: "huangxiaojian"
3. __proto__: Object