解析错误：语法错误，第1行意外的$ end pm.php

Question

在纠正这个问题时遇到一些困难。任何帮助都是天赐之物！我收到错误＆＃34;解析错误：语法错误，第1行和第34行的pm.php意外$结束;我确实相信我错过了一个支架或其他东西，但我不太确定，你们可以看看吗？非常感谢！

<?php if (!defined('BASEPATH')) exit('Access denied!');
Class Pm extends CI_Controller
{
private $touser=null;
function __construct()
{

    parent::__construct();
    if(!$this->tank_auth->is_logged_in())
    {
        redirect('/ucp/login/');
    }
    $this->load->model('messages');
}

public function compose()
{
    $username=$this->uri->segment(3,'');
    $message=array(
        'reciever'=>!empty($username) ? $username : $this->input->post('reciever'),
        'title'=>$this->input->post('title'),
        'content'=>$this->input->post('content'),
    );

    $this->load->library('form_validation');
    $this->form_validation->set_rules('reciever', 'Reciever', 'trim|required|xss_clean|max_length[20]|callback_username_check');
    $this->form_validation->set_rules('title', 'Title', 'trim|required|xss_clean|max_length[225]');
    $this->form_validation->set_rules('content', 'Content', 'trim|required|xss_clean|max_length[1000]');

    if($this->form_validation->run())
    {
        $reciever=$this->form_validation->set_value('reciever');

        $message=array(
        'uid'=>$this->tank_auth->get_user_id(),
        'username'=>$this->tank_auth->get_username(),
        'touid'=>$this->touser->id,
        'tousername'=>$this->touser->username,
        'title'=>$this->form_validation->set_value('title'),
        'content'=>$this->form_validation->set_value('content'),
        'created_at'=>time()

        );
        if($this->messages->add($message))
        {
           $this->users->pm_count($this->touser->id);
           $this->session->set_flashdata('success','Message sent!');
        }


        redirect('/pm/sent');



    }

    $data['message']=$message;
    $data['type']='add';
    $data['partial']="message/_form";
    $data['heading']='Compose Message';
    $this->load->view('message/message',$data);
}
public function reply($id)
{
    if(!is_numeric($id))
    {
        show_404();
    }
    $viewer=$this->tank_auth->get_user_id();
    if((!$message=$this->messages->get($id))||$viewer!=$message->touid)
    {
        show_404();
    }
    $this->load->helper(array('form'));
    $data['message']=array(
    'reciever'=>$message->username,
    'title'=>'RE: '.$message->title,
    'content'=>''

    );

    $data['type']='add';
    $data['partial']="message/_form";
    $data['heading']='Compose Message';
    $this->load->view('message/message',$data);

}
public function inbox()
{
    $this->listing();
}
public function sent()
{
    $this->listing();
}
private function listing()
{
    $type=$this->uri->segment(2,'inbox');
    $page=$this->uri->segment(3,0);
    if(!in_array($type,array('inbox','sent')))
    {
        show_404();
    }

    //pagination
    $conditions = array('uid' => $this->tank_auth->get_user_id(),'type' => $type);
    $pageData = $this->messages->getPageData('pm/'.$type,3,$conditions);
    $data['pagination_links'] = $pageData['pagination_links'];
    $data['pms']= $pageData['list'];

    $data['partial'] = "message/_box";
    $data['type'] = $type;
    $data['heading']= $type;
    $this->load->view('message/message',$data);

}
public function show($id)
{
    if(!is_numeric($id))
    {
        show_404();
    }
    $viewer=$this->tank_auth->get_user_id();
    $message=$this->messages->get($id);
    if($message->uid==$viewer)
    {
        if($message->sentbox==0)show_404();
        $type='sent';
    }
    elseif($message->touid==$viewer)
    {
        $type='inbox';
        if($message->inbox==0)show_404();
        if($message->unread==1)
        {

            $this->messages->update(array('unread'=>0),$message->id);
             $this->users->pm_count($viewer,'del');
        }
    }
    else
    {
        show_404();
    }

    $data['type']=$type;
    $data['pm']=$message;
    $data['heading'] = htmlspecialchars($message->title);
    $data['partial']="message/_show";
    $this->load->view('message/message',$data);
}

public function del($id)
{
    if(!is_numeric($id))
    {
        show_404();
    }
    $viewer=$this->tank_auth->get_user_id();
    $message=$this->messages->get($id);
    if($message->uid==$viewer)
    {
        $type='sent';
        if($message->sentbox==0)
        {
            show_404();
        }
        elseif($message->inbox==1)
        {
            $this->messages->update(array('sentbox'=>0),$message->id);
        }
        else
        {
            $this->messages->delete($id);
        }
    }
    elseif($message->touid==$viewer)
    {
        $type='inbox';
        if($message->inbox==0)
        {
            show_404();
        }
        else
        {
            if($message->unread==1)
            {
                $this->users->pm_count($viewer,'del');
            }
            if($message->sentbox==1)
            {
                $this->messages->update(array('inbox'=>0),$message->id);
            }
            else
            {
                $this->messages->delete($id);
            }
        }


    }
    else
    {
        show_404();
    }
    $this->session->set_flashdata('notice','Message deleted!');
    redirect('pm/'.$type);
}
public function username_check($username)
{
    if(preg_match('/\W+/',$username))
    {
        $this->form_validation->set_message('username_check', 'The %s field contains illegal characters');
        return FALSE;

    }
    if(!$user=$this->users-> get_user_by_username($username))
    {
        $this->form_validation->set_message('username_check', "user $username doesn't exist");
        return FALSE;
    }
    if($user->username==$this->tank_auth->get_username())
    {
        $this->form_validation->set_message('username_check', "Sending message to yourself is unnecessary");
        return FALSE;
    }
    $this->touser=$user;
    return true;
}

}

?>