<?phprequire 'dbinfo.php'; try {$db = new PDO($dsn, $username, $password);$db->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION ); $sth = $db->query("SELECT * FROM user_tracks");$loc = $sth->fetchAll(); $locations = array_values($loc);echo json_encode( array("user"=>( $locations )));} catch (Exception $e) {echo $e->getMessage();} ?>代码应该返回：{"user":[{"id":"1","Latitude":"12.9555033...
1、数据格式样本 1.1 COCO的json数据格式 {"info": {"description": "COCO 2017 Dataset","url": "http://cocodataset.org","version": "1.0","year": 2017,"contributor": "COCO Consortium","date_created": "2017/09/01"},"licenses": [{"url": "http://creativecommons.org/licenses/by-nc-sa/2.0/","id": 1,"name": "Attribution-NonCommercial-ShareAlike License"}], "images": [{"license": 4,"file_name": "000000397133....