$dbhost = 'localhost:3306';  // mysql服务器主机地址

$dbuser = 'root';            // mysql用户名

$dbpass = '123456';          // mysql用户名密码

$conn = mysqli_connect($dbhost, $dbuser, $dbpass);

if(! $conn )

{

    die('连接失败: ' . mysqli_error($conn));

}

// 设置编码，防止中文乱码

mysqli_query($conn , "set names utf8");

$sql = 'DELETE FROM runoob_tbl

        WHERE runoob_id=3';

mysqli_select_db( $conn, 'RUNOOB' );

$retval = mysqli_query( $conn, $sql );

if(! $retval )

{

    die('无法删除数据: ' . mysqli_error($conn));

}

echo '数据删除成功！';

mysqli_close($conn);

?>