转自：
转自：
1.json_encode
在 php 中使用 json_encode() 内置函数(php > 5.2)可以使用得 php 中数据可以与其它语言很好的传递并且使用它。
这个函数的功能是将数值转换成json数据存储格式。<?php$arr = array('Name'=>'希亚','Age'=>20);$jsonencode = json_encode($arr);echo $jsonencode;?>程序运行结果如下：{"Name":null,"Age":20}json_encode 函数中中文被编码成 null 了，Google 了一下，很简单，为了与前端紧密结合，Json 只支持 utf-8 编码，我认为是前端的 Javascript 也是 utf-8 的原因。<?php$array = array ( 'title'=>iconv('gb2312','utf-8','这里是中文标题'),'body'=>'abcd...' );echo json_encode($array);?>这个程序的运行结果为：{"title":"\u8fd9\u91cc\u662f\u4e2d\u6587\u6807\u9898","body":"abcd..."}-----{["标题1"]:["标题内容"],["标题2"]:["标题内容"],XXXXXX}
2.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
<?php
$json = '{"a":1,"b":2,"c":3,"d":4,"e":5}'; var_dump(json_decode($json)); var_dump(json_decode($json, true)); ?>output #1:
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) }Example #2 json_decode() 的例子
$data='[{"Name":"a1","Number":"123","Contno":"000","QQNo":""},{"Name":"a1","Number":"123","Contno":"000","QQNo":""},{"Name":"a1","Number":"123","Contno":"000","QQNo":""}]';
echo json_decode($data,true);
output#2:
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] => ) )
echo json_decode($data,true);
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] => ) )