1.json_decode()
json_decode
(PHP 5 >= 5.2.0, PECL json >= 1.2.0)
json_decode — 對 JSON 格式的字符串進行編碼
說明
mixed json_decode ( string $json [, bool $assoc ] )
接受一個 JSON 格式的字符串並且把它轉換為 PHP 變量
參數
json
待解碼的 json string 格式的字符串。
assoc
當該參數為 TRUE 時，將返回 array 而非 object 。
返回值
Returns an object or if the optional assoc parameter is TRUE, an associative array is instead returned.
范例
Example #1 json_decode() 的例子
代碼如下<?php
$json = '{"a":1,"b":2,"c":3,"d":4,"e":5}';
var_dump(json_decode($json));
var_dump(json_decode($json, true));
?>
上例將輸出：
object(stdClass)#1 (5) {
["a"] => int(1)
["b"] => int(2)
["c"] => int(3)
["d"] => int(4)
["e"] => int(5)
}
array(5) {
["a"] => int(1)
["b"] => int(2)
["c"] => int(3)
["d"] => int(4)
["e"] => int(5)
}
$data='[{"Name":"a1","Number":"123","Contno":"000","QQNo":""},{"Name":"a1","Number":"123","Contno":"000","QQNo":""},{"Name":"a1","Number":"123","Contno":"000","QQNo":""}]';
echo json_decode($data);
結果為：
Array ( [0] => stdClass Object ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) [1] => stdClass Object ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) [2] => stdClass Object ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) )
可以看出經過json_decode()編譯出來的是對象,現在輸出json_decode($data,true)試下
代碼如下echo json_decode($data,true);
結果：
Array ( [0] => Array ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) [1] => Array ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) [2] => Array ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) )
可以看出 json_decode($data,true)輸出的一個關聯數組,由此可知json_decode($data)輸出的是對象,而json_decode("$arr",true)是把它強制生成PHP關聯數組.
假如我們獲取的JSON數據如下：(可以使用curl、fsockopen等方式獲取)
代碼如下{
"from":"zh",
"to":"en",
"trans_result":[
{
"src":"u4f60u597d",
"dst":"Hello"
}
]
}
一、json_decode返回array的方式：
json_decode($data,true);用json_decode函數返回array的方式得到：
代碼如下Array
(
[from] => zh
[to] => en
[trans_result] => Array
(
[0] => Array
(
[src] => 你好
[dst] => Hello
)
)
)
我們在PHP語言中可以用以下方法取得我們想要的值：
代碼如下<?php
$data = <<<STR
{
"from":"zh",
"to":"en",
"trans_result":[
{
"src":"u4f60u597d",
"dst":"Hello"
}
]
}
STR;
$jsondata=json_decode($data,true);
header("Content-Type: text/html; charset=UTF-8");
print_r($jsondata);www.111cn.net
echo "<br />".$jsondata['to']; //en
echo "<br />".$jsondata['trans_result'][0]['dst']; //Hello
?>
二、json_decode返回object的方式：
json_decode($data);
用json_decode函數返回object的方式得到：
代碼如下stdClass Object
(
[from] => zh
[to] => en
[trans_result] => Array
(
[0] => stdClass Object
(
[src] => 你好
[dst] => Hello
)
)
)
我們在PHP語言中可以用以下方法取得我們想要的值：
代碼如下<?php
$data = <<<STR
{
"from":"zh",
"to":"en",
"trans_result":[
{
"src":"u4f60u597d",
"dst":"Hello"
}
]
}
STR;
$jsondata=json_decode($data);
header("Content-Type: text/html; charset=UTF-8");
print_r($jsondata);
echo "<br />".$jsondata->from; //zh
echo "<br />".$jsondata->trans_result[0]->src; //你好
?>
