<?php
//得到提交的用户名和密码
$uname = $_POST['uname'];//改成你自己数据库的字段
$upass = $_POST['upass'];//改成你自己数据库的字段
//action是用来判断是注册还查询
$action = $_POST['action'];
 
//你自己的数据库地址
$conn = mysql_connect("121.42.8.157","root","~cs3x@2022#123~","xcjkdba",13307);
if(!$conn)
{
    die("error");
}
 
//改成你自己的数据库名称
$result = mysql_select_db("xcjkdba",$conn);
if(!$result)
{
    mysql_close($conn);
    die("error");
}
 
//判断用户是登录还是注册
if($action == "login")
{
    //匹配用户
    $sql = "select x, y, z from his_location_tadiao_result order by loc_time desc limit 100";
    
    //运行
    $rs=mysql_query($sql);
    if(!$rs)
    {
        mysql_close($conn);
        die("error");
    }
    $recordCount=mysql_num_rows($rs);
    if($recordCount>0)
    {
        echo "success";
    }
    else
    {
         echo "error";
    }
}
else if($action == "regist")
{
    //设定字符集
    $sql = "set names utf8";
    //运行
    mysql_query($sql);
    
    //查看用户是否存在
    $sql = "select *from t_user where uname='".$uname."'";
    //运行
    $rs=mysql_query($sql);
    if(!$rs)
    {
        mysql_close($conn);
        die("error");
    }
    //获得数据库行数
    $recordCount = mysql_num_rows($rs);
    if($recordCount>0)
    {
        mysql_close($conn);
        die("exist");
    }else
    {
        //如果不存在就写入数据库
        $sql = "insert into t_user(uname,upass) values('".$uname."','".$upass."')";
        //运行
        $rs=mysql_query($sql);
        if(!$rs)
        {
            mysql_close($conn);
            die("error");
        }
        else
        {
            echo "success";
        }
        
    }
    //如果存在就提示
 
}
else
{
    echo "error!";
}
 
//关闭数据库
mysql_close($conn);
?>