【mysql】---php链接数据库---【巷子】

<?php
    //第一件事情连接数据库
    header("content-type:text/html;charset=utf8");
    //服务器地址
    $db_hostname = "localhost";

    //用户名
    $db_username = "root";

    //密码
    $db_password = "root";

    //数据库的名称
    $db_name = "db_1802";

    //连接数据库
    $conn = new mysqli($db_hostname,$db_username,$db_password,$db_name);

    //如果连接失败的话那么就告诉客户端  连接失败 并且终止这个程序
    if($conn->connect_error){
        die("连接失败".$conn->connect_error);
    }

    //设置数据库的编码格式
    $conn->query("set names utf8");
?>

<?php
    include "public.php";

    $uname = $_REQUEST["username"];
    $h5 = $_REQUEST["h5"];
    $js = $_REQUEST["js"];

    //编写sql语句
    $sql = "insert into `score` (sname,sh5,sjs) values (‘$uname‘,$h5,$js)";

    //执行sql语句
    $rows = mysqli_query($conn,$sql);//受影响的行数

    if($rows){
        echo "<script>alert(‘添加成功‘);location.href=‘score.php‘;</script>";
    }else{
        echo "<script>alert(‘添加失败‘);location.href=‘add.html‘;</script>";
    }
?>