<?php 
 header("charset=utf-8"); 
 $servername="localhost"; 
 $username="root"; 
 $password="root"; 
 $dbname="test"; 
 $conn = mysql_connect($servername,$username,$password); 
 if(!$conn){ 
  echo "数据库连接失败！"; 
 } 
 mysql_select_db($dbname); 
 class Response{ 
  public static function json($code,$message="",$data=array()){ 
   $result=array( 
    'code'=>$code, 
    'message'=>$message, 
    'data'=>$data 
   ); 
   //输出json 
   echo json_encode($result); 
   exit; 
  } 
 } 
 
?>