每日总结

1.今天学习php与mysql的连接

$link=mysqli_connect("localhost","root","123456");
        if(!$link)
        {
            echo '连接失败';
        }
        mysqli_select_db($link,"goodlist");

        mysqli_set_charset($link,'UTF-8');

        $sql="select * from User";

        $result=mysqli_query($link,$sql);
//处理数据
        if($result)
        {
            //fetch_row获取行的数据
            //mysqli_detch_assoc获取对应键值,$attr['linenum']可获取数据
            //获取字段数
            //echo mysqli_num_fields($result),"<br/>";
            //获取信息数
            //echo mysqli_num_rows($result),"<br/>";
            $g_having=false;
            while($attr=mysqli_fetch_array($result))
            {
                if($attr[0]==$name)
                {
                    $g_having=true;
                    if($attr[1]==$password)
                    {
                        $_SESSION["name"]=$name;
                        $_SESSION["type"]=$attr[2];
                        header("location:showgood.php");
                    }
                    else{
                        header("location:index.php?message=WrongPassword!");
                    }
                }

            }
            if(!$g_having)
            {
                header("location:index.php?message=WrongUsername!");
            }
        }
//关闭数据库连接
        mysqli_close($link);


    }else{
        header("location:index.php?message=CaptchaError!");
    }
}