<?php
//php反編碼解析json信息
//json_decode(json字符串);
$city = array('shandong'=>'jinan','henan'=>'zhengzhou','hebei'=>'shijiazhuang');
$jn_city = json_encode($city);
//反編碼json
$fan_city = json_decode($jn_city,false);//第二個參數(shù)false則返回object類型，false可以默認不寫
var_dump($fan_city);//object(stdClass)#1 (3) { ["shandong"]=> string(5) "jinan" ["henan"]=> string(9) "zhengzhou" ["hebei"]=> string(12) "shijiazhuang" } 
echo "<br />";
$fan_city = json_decode($jn_city,true);//第二個參數(shù)true則返回array類型
var_dump($fan_city);//array(3) { ["shandong"]=> string(5) "jinan" ["henan"]=> string(9) "zhengzhou" ["hebei"]=> string(12) "shijiazhuang" }

<?php 
 
//json信息反編碼 
 
//不同php版本，對“純json字符串”解析存在問題 
//使用雙引號定義的json字符串反編碼操作變?yōu)閚ull 
//$jn = "{'name':'tom','age':'20','addr':'beijing'}"; 
//$fan_jn = json_decode($jn,true); 
//var_dump($fan_jn);//NULL 
 
//使用單引號定義的json字符串反編碼操作會成功 
$jn = '{"name":"tom","age":"20","addr":"beijing"}'; 
$fan_jn = json_decode($jn,true); 
var_dump($fan_jn);