http://www.3lian.com/edu/2014/02-11/128395.html
1.json_decode()
json_decode
(PHP 5 >= 5.2.0, PECL json >= 1.2.0)
json_decode — 對 JSON 格式的字元串進行編碼
說明
mixed json_decode ( string $json [, bool $assoc ] )
接受一個 JSON 格式的字元串并且把它轉換為 PHP 變量
參數
json
待解碼的 json string 格式的字元串。
assoc
當該參數為 TRUE 時,将傳回 array 而非 object 。
傳回值
Returns an object or if the optional assoc parameter is TRUE, an associative array is instead returned.
範例
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)); ?> 上例将輸出: object(stdClass)#1 (5) { ["a"] => int(1) ["b"] => int(2) ["c"] => int(3) ["d"] => int(4) ["e"] => int(5) } array(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($data,true)試下
echo json_decode($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("$arr",true)是把它強制生成PHP關聯數組.
假如我們擷取的JSON資料如下:(可以使用curl、fsockopen等方式擷取)
{ "from":"zh", "to":"en", "trans_result":[ { "src":"u4f60u597d", "dst":"Hello" } ] |
一、json_decode傳回array的方式:
json_decode($data,true);用json_decode函數傳回array的方式得到:
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:
<?php $data = <<<STR 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 />".$jsondata['trans_result'][0]['dst']; //Hello |
二、json_decode傳回object的方式:
json_decode($data);
用json_decode函數傳回object的方式得到:
stdClass Object [0] => stdClass Object |
$jsondata=json_decode($data); print_r($jsondata); echo "<br />".$jsondata->from; //zh echo "<br />".$jsondata->trans_result[0]->src; //你好 |