//走接口
if ($a == 'get_users') {
//检查用户
if ($uid == 0) {
$output = array('data'=>NULL,'info'=>'The uid is null!','code'=>-401);
exit(json_encode($output));
}
//假设 $mysql 是数据库
$mysql = array(
10001 => array(
'uid'=>10001,'vip'=>5,'nickname' => 'Shine X','email'=>'979137@qq.com','qq'=>979137,'gold'=>1500,'powerplay'=> array('2xp'=>12,'gem'=>12,'bingo'=>5,'keys'=>5,'chest'=>8),'gems'=> array('red'=>13,'green'=>3,'blue'=>8,'yellow'=>17),'ctime'=>1376523234,'lastLogin'=>1377123144,'level'=>19,'exp'=>16758,),10002 => array(
'uid'=>10002,'vip'=>50,'nickname' => 'elva','email'=>'elva@ezhi.net','qq'=>NULL,'gold'=>14320,'powerplay'=> array('2xp'=>1,'gem'=>120,'bingo'=>51,'level'=>112,'exp'=>167588,10003 => array(
'uid' => 10003,'vip' => 5,'nickname' => 'Lily','email' => 'Lily@ezhi.net','qq' => NULL,'gold' => 1541,'powerplay'=> array('2xp'=>2,'gem'=>112,'bingo'=>4,'keys'=>7,'gems' => array('red'=>13,'blue'=>9,'yellow'=>7),'ctime' => 1376523234,'lastLogin'=> 1377123144,'level' => 10,'exp' => 1758,);
$uidArr = array(10001,10002,10003);
if (in_array($uid,$uidArr,true)) {
$output = array('data' => NULL,'info'=>'The user does not exist!','code' => -402);
exit(json_encode($output));
}

   //查询数据库
   $userInfo = $mysql[$uid];
   //输出数据
   $output = array(
    'data' => array(
    'userInfo' => $userInfo,'isLogin' => true,//是否首次登陆
    'unread' => 4,//未读消息数量
    'untask' => 3,//未完成任务
    ),'info' => 'Here is the message which,commonly used in popup window',//消息提示，客户端常会用此作为给弹窗信息。
  'code' => 200,//成功与失败的代码，一般都是正数或者负数
    );
   exit(json_encode($output));
} elseif ($a == 'get_games_result') {

   //... 
   die('您正在调 get_games_result 接口!'); 
  } elseif ($a == 'upload_avatars') { 
   //.... 
   die('您正在调 upload_avatars 接口!');

  }