Question

我需要一种方法将变量从一个控制器传递到视图 从另一个控制器中加载。

我想在主页上添加登录表单并评估$ error 变量以查看它是否等于1并基于此显示错误消息。

控制器/ posts.php：

<?php
class Posts extends CI_Controller{

    function __construct(){

        parent::__construct();
        $this->load->model('post');

        $this->load->library('pagination');
    }

    function index($start=0){

        $this->session->unset_userdata('pretrazi');
        $data['posts']=$this->post->get_posts(1,$start);

        $config['base_url']=base_url().'posts/index/';
        $config['total_rows']=$this->post->get_posts_count();
        $config['per_page']=1;
        $config['full_tag_open'] = '<ul class="pagination">';
        $config['full_tag_close'] = '</ul>';
        $config['prev_link'] = '&lt;';
        $config['prev_tag_open'] = '<li>';
        $config['prev_tag_close'] = '</li>';
        $config['next_link'] = '&gt;';
        $config['next_tag_open'] = '<li>';
        $config['next_tag_close'] = '</li>';
        $config['cur_tag_open'] = '<li class="active"><a href="#"><span class="sr-only">(current)</span>';
        $config['cur_tag_close'] = '</a></li>';
        $config['num_tag_open'] = '<li>';
        $config['num_tag_close'] = '</li>';

        $config['first_tag_open'] = '<li>';
        $config['first_tag_close'] = '</li>';
        $config['last_tag_open'] = '<li>';
        $config['last_tag_close'] = '</li>';

        $this->pagination->initialize($config);
        $data['pages']=$this->pagination->create_links();
        $this->load->view('posts_index',$data);
    }

    function post($slug){

        $data['post']=$this->post->get_post($slug);
        $this->load->view('post',$data);
    }

    function new_post(){

        if($_POST){
            $data=array(
                'title'=>$_POST['title'],
                'post'=>$_POST['post'],
                'active'=>1,
                'slug' => url_title($this->input->post('title'), 'dash', TRUE)
            );
            $this->post->insert_post($data);
            redirect(base_url().'posts/');
        }else{
            $this->load->view('new_post');
        }
    }

    function editpost($postid){

        $data['success']=0;
        if($_POST){
            $data_post=array(
                'title'=>$_POST['title'],
                'post'=>$_POST['post'],
                'slug' => url_title($this->input->post('title'), 'dash', TRUE)
            );
            $this->post->update_post($postid,$data_post);
            $data['success']=1;
        }

        $data['post']=$this->post->get_post_by_id($postid);
        $this->load->view('edit_post',$data);
    }

    function deletepost($postid){

        $this->post->delete_post($postid);
        redirect(base_url().'posts');
    }
?>

控制器/ users.php：

<?php
class Users extends CI_Controller{

    function login(){

        $data['error']=0;

        if($_POST){
            $this->load->model('user');
            $username=$this->input->post('username',true);
            $password=$this->input->post('password',true);
            $user=$this->user->login($username,$password);

            if(!$user){
            $data['error']=1;

            }else{
            $this->session->set_userdata('userID',$user['userID']);
            $this->session->set_userdata('username',$user['username']);

            redirect(base_url().'posts');
            }
        }   
    }

    function logout(){

        $this->session->sess_destroy();
        redirect(base_url().'posts');
    }
}

?>

视图/ posts_index.php：

<!DOCTYPE html>
<html>
 <head>
   <meta charset="UTF-8">
   <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
   <link href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet">
   <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
 </head>
<body>
  <div id="header">
<?php
  if($this->session->userdata('username')){
?>
<p>Welcome <?php echo $this->session->userdata('username')?></p>
<a href="<?=base_url()?>users/logout">Logout</a>
<?php }else{?>

<?php
if(isset($error) and $error==1){
echo "Password/username wrong";
}?>
<form action="<?=base_url()?>users/login" method="POST">
Username:<input type="text" name="username"><br>
Password:<input type="password" name="password"><br>
<input type="submit" value="Log in">
</form>
<?php } ?>
</div>
<div id="container">
<h1>My blog</h1>
<?php
if(!isset($posts)){
?>
<p>There are no posts</p>
<?php
}else{
foreach($posts as $row){
?>
<h2><a href="<?php echo base_url()?>posts/post/<?php echo $row['slug']?>"><?php echo $row['title']?></a><?php if($this->session->userdata('username')){?>-<a href="<?php echo
base_url()?>posts/editpost/<?php echo $row['postID']?>">Edit</a> | <a class="delete" href="<?php echo base_url()?>posts/deletepost/<?php echo $row['postID']?>">Delete</a><?php }?></h2>
<p><?php echo substr(strip_tags($row['post']),0,200).".."?></p>
<p><a href="<?php echo base_url()?>posts/post/<?php echo $row['slug']?>">Read more</a></p>
<hr>
<?php
}
    }

?>
</div>
<?php echo $pages;?>
<script>
$(function() {

   $("a.delete").click(function() {

       return confirm("Are you sure you want to delete this?");
   });
});
</script>

</body>
</html>

每当提供错误的登录凭据或只是点击登录按钮而不输入任何内容我都会得到一个空白页。我怎么能得到这个$ error 到显示在posts_index视图上的表单上方，这是我的主页???

Answer 1

只需在会话中设置flashdata即可。

试试这个：在登录成功后，在users.php控制器中检查设置flash数据。

 if(!$user)
{
    $data_err  = array(
                       'log_failed' =>'Invalid Login!',
                       'log_user'   => $username
                      );
    $this->session->set_flashdata('log_status',$data_err);
    redirect(base_url());
}

并在视图中：

if (null != $this->session->flashdata ( 'log_status' )) 
{
    $errorData = $this->session->flashdata ( 'log_status' );
    echo $errorData ["log_failed"];
}

在codeigniter主页上的登录表单

1 个答案: