利用新浪或者淘宝开放api调用ip获取地理位置的时候返回数据是以json形式展现的。但是怎么才能 把这些文件成功赋值给某一变量呢？

1. 返回数据如下 {"code":0,"data":{"country":"\u4e2d\u56fd","country_id":"CN","area":"\u534e\u5317","area_id":"100000","region":"\u5317\u4eac\u5e02","region_id":"110000","city":"\u5317\u4eac\u5e02","city_id":"110100","county":"","county_id":"-1","isp":"\u8054\u901a","isp_id":"100026","ip":"123.123.123.123"}}  
2.   
3. 但是怎么才能 把这些文件成功赋值给某一变量呢？  
4. \u4e2d\u56fd 这种怎么进行转码呢？  
5. 代码如下  
6.   
7. $ip="123.123.123.123";  
8. //获取api的数据病赋值、$res  
9. $res = @file_get_contents('http://ip.taobao.com/service/getIpInfo.php?ip='.$ip);  
10.   
11. //接收的值如下   
12. //{"code":0,"data":{"country":"\u4e2d\u56fd","country_id":"CN","area":"\u534e\u5317","area_id":"100000","region":"\u5317\u4eac\u5e02","region_id":"110000","city":"\u5317\u4eac\u5e02","city_id":"110100","county":"","county_id":"-1","isp":"\u8054\u901a","isp_id":"100026","ip":"123.123.123.123"}}  
13.   
14.   
15. 进行数据转换   
16.   
17. $json=preg_replace("#\\\u([0-9a-f]{4})#ie", "iconv('UCS-2BE', 'UTF-8', pack('H4', '\\1'))", $res);  
18.   
19. //转换完成以后的代码如下   
20.   
21. {"code":0,"data":{"country":"中国","country_id":"CN","area":"华北","area_id":"100000","region":"北京市","region_i