PHP implements guestbook function based on object-oriented

//留言实体类
class message
{
  public $name;//留言者姓名
  public $email;//留言者联系方式
  public $content;//留言内容
  public function __set($name,$value)
  {
    $this->$name = $value;
  }
  public function __get($name)
  {
    if(!isset($this->$name))
    {
      $this->$name = NULL;
    }
  }
}

class gbookModel
{
  private $bookPath;//留言本文件
  private $data;//留言数据
  public function setBookPath($bookPath)
  {
    $this->bookPath = $bookPath;
  }
  public function getBookPath()
  {
    return $this->bookPath;
  }
  public function open()
  {
  }
  public function close()
  {
  }
  public function read()
  {
    return file_get_contents($this->bookPath);
  }
  //写入留言
  public function write($data)
  {
    $this->data = self::safe($data)->name."&".self::safe($data)->email." said: ".self::safe($data)->content.PHP_EOL;
    return file_put_contents($this->bookPath,$this->data,FILE_APPEND);
  }
  //模拟数据的安全处理，先拆包再打包
  public static function safe($data)
  {
    $reflect = new ReflectionObject($data);
    $props = $reflect->getProperties();
    $messagebox = new stdClass();
    foreach($props as $props)
    {
      $ivar = $props->getName();
      $messagebox->$ivar = trim($props->getValue($data));
    }
    return $messagebox;
  }
  public function delete()
  {
    file_put_contents($this->bookPath,"it's empty now");
  }
}

class leaveModel
{
  public function write(gbookModel $gb, $data)
  {
    $book = $gb->getBookPath();
    $gb->write($data);
    //记录日志
  }
}

class authorControl
{
  public function message(leaveModel $l, gbookModel $g, message $data)
  {
    //在留言本上留言
    $l->write($g,$data);
  }
  public function view(gbookModel $g)
  {
    //查看留言本内容
    return $g->read();
  }
  public function delete(gbookModel $g)
  {
    $g->delete();
    echo self::view($g);
  }
}

$message = new message;
$message->name = 'chenqionghe';
$message->email = 'cqh@cqh.net';
$message->content = 'chenqionghe is a handson boy.';
$gb = new authorControl();//新建一个留言相关的控制器
$pen = new leaveModel();//拿出笔
$book = new gbookModel();//翻出笔记本
$book->setBookPath("E:\\chenqionghe.txt");
$gb->message($pen,$book,$message);
echo $gb->view($book);
//$gb->delete($book);

public function readByPage()
{
    $handle = file($this->bookPath);
    $count = count($handle);
    $page = isset($_GET['page']) ? intval($_GET['page']) : 1;
    if($page<1 || $page>$count)
      $page = 1;
    $pnum = 9;
    $begin = ($page-1) * $pnum;
    $end = ($begin+$pnum) > $count ? $count :$begin + $pnum;
    for($i=$begin; $i<$end; $i++)
    {
      echo &#39;<strong>&#39;,$i+1,&#39;</strong>&#39;,$handle[$i],&#39;<br />&#39;;
    }
    for($i=1;$i<ceil($count/$pnum);$i++)
    {
      echo &#39;<a href="?page=&#39;.$i.&#39;" rel="external nofollow" rel="external nofollow" >&#39;.$i.&#39;</a>&#39;;
    }
}

public function viewByPage(gbookModel $g)
{
    return $g->readByPage();
}

bookPath = $bookPath;
  }
  public function getBookPath()
  {
    return $this->bookPath;
  }
  public function open()
  {
  }
  public function close()
  {
  }
  public function read()
  {
    return file_get_contents($this->bookPath);
  }
  public function readByPage()
  {
    $handle = file($this->bookPath);
    $count = count($handle);
    $page = isset($_GET['page']) ? intval($_GET['page']) : 1;
    if($page<1 || $page>$count)
      $page = 1;
    $pnum = 9;
    $begin = ($page-1) * $pnum;
    $end = ($begin+$pnum) > $count ? $count :$begin + $pnum;
    for($i=$begin; $i<$end; $i++)
    {
      echo '',$i+1,'',$handle[$i],'
';
    }
    for($i=1;$i'.$i.'';
    }
  }
  //写入留言
  public function write($data)
  {
    $this->data = self::safe($data)->name."&".self::safe($data)->email." said: ".self::safe($data)->content.PHP_EOL;
    return file_put_contents($this->bookPath,$this->data,FILE_APPEND);
  }
  //模拟数据的安全处理，先拆包再打包
  public static function safe($data)
  {
    $reflect = new ReflectionObject($data);
    $props = $reflect->getProperties();
    $messagebox = new stdClass();
    foreach($props as $props)
    {
      $ivar = $props->getName();
      $messagebox->$ivar = trim($props->getValue($data));
    }
    return $messagebox;
  }
  public function delete()
  {
    file_put_contents($this->bookPath,"it's empty now");
  }
}
class leaveModel
{
  public function write(gbookModel $gb, $data)
  {
    $book = $gb->getBookPath();
    $gb->write($data);
    //记录日志
  }
}
class authorControl
{
  public function message(leaveModel $l, gbookModel $g, message $data)
  {
    //在留言本上留言
    $l->write($g,$data);
  }
  public function view(gbookModel $g)
  {
    //查看留言本内容
    return $g->read();
  }
  public function viewByPage(gbookModel $g)
  {
    return $g->readByPage();
  }
  public function delete(gbookModel $g)
  {
    $g->delete();
    echo self::view($g);
  }
}
$message = new message;
$message->name = 'chenqionghe';
$message->email = 'cqh@cqh.net';
$message->content = 'chenqionghe is a handson boy.';
$gb = new authorControl();//新建一个留言相关的控制器
$pen = new leaveModel();//拿出笔
$book = new gbookModel();//翻出笔记本
$book->setBookPath("E:\\chenqionghe.txt");
$gb->message($pen,$book,$message);
//echo $gb->view($book);
echo $gb->viewByPage($book);
//$gb->delete($book);