php中json_decode返回数组或对象的实例
PHP5.2.0及以上版本具有json_decode函数,该函数是用来解析JSON格式的数据,可以返回array(数组)或object(对象)两种结果,下面将分两种情况具体介绍json_decode的用法以及如何取得我们想要的值。
1.json_decode()
json_decode
(PHP 5 >= 5.2.0, PECL json >= 1.2.0)
json_decode — 对 JSON 格式的字符串进行编码
说明
mixed json_decode ( string $json [, bool $assoc ] )
接受一个 JSON 格式的字符串并且把它转换为 PHP 变量
参数
json
待解码的 json string 格式的字符串。
assoc
当该参数为 TRUE 时,将返回 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
代码如下 | 复制代码 |
$json = '{"a":1,"b":2,"c":3,"d":4,"e":5}'; 上例将输出: object(stdClass)#1 (5) { array(5) {
结果为: Array ( [0] => stdClass Object ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) [1] => stdClass Object ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) [2] => stdClass Object ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) ) |
可以看出经过json_decode()编译出来的是对象,现在输出json_decode($data,true)试下
代码如下 | 复制代码 |
echo json_decode($data,true); 结果: Array ( [0] => Array ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) [1] => Array ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) [2] => Array ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) ) |
可以看出 json_decode($data,true)输出的一个关联数组,由此可知json_decode($data)输出的是对象,而json_decode("$arr",true)是把它强制生成PHP关联数组.
假如我们获取的JSON数据如下:(可以使用curl、fsockopen等方式获取)
代码如下 | 复制代码 |
{ |
一、json_decode返回array的方式:
json_decode($data,true);用json_decode函数返回array的方式得到:
代码如下 | 复制代码 |
Array ) ) |
我们在PHP语言中可以用以下方法取得我们想要的值:
代码如下 | 复制代码 |
$data =
{ |
二、json_decode返回object的方式:
json_decode($data);
用json_decode函数返回object的方式得到:
代码如下 | 复制代码 |
stdClass Object ) ) |
我们在PHP语言中可以用以下方法取得我们想要的值:
代码如下 | 复制代码 |
$data =
{ STR; |

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