php post json数据

1. function http_post_data($url, $data_string) {
2. $ch = curl_init();
3. curl_setopt($ch, CURLOPT_POST, 1);
4. curl_setopt($ch, CURLOPT_URL, $url);
5. curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
6. curl_setopt($ch, CURLOPT_HTTPHEADER, array(
7. 'Content-Type: application/json; charset=utf-8',
8. 'Content-Length: ' . strlen($data_string))
9. );
10. ob_start();
11. curl_exec($ch);
12. $return_content = ob_get_contents();
13. ob_end_clean();
14. $return_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
15. return array($return_code, $return_content);
16. }
17. $url = "http://www.xxxx.com";
18. $data = json_encode(array('cmd'=>"Query_Ranking_Sys",'group'=>1,'room'=>0,'name'=>"RoomSvr",'value'=>array(0=>array('key'=>5,'beginindex'=>0,'count'=>10))));
19. list($return_code, $return_content) = http_post_data($url, $data);

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php, post, json