php简单操作数据库

自己经常用来写测试用，又苦于经常找不到，索性记在这里方便日后查看

        $con=mysqli_connect("localhost","root","root","demo"); 
        if (mysqli_connect_errno($con)) 
        { 
            echo "连接 MySQL 失败: " . mysqli_connect_error(); 
        } 
         
        // 执行查询
         mysqli_query($con,"SELECT * FROM websites");

        mysqli_close($con);