Question

我在CodeIgniter的“视图”中出现错误 看起来像这样的错误

遇到PHP错误严重性：警告消息：无效为foreach（）文件名提供的参数： public / search_query_result.php行号：17

我的 search_query_result.php

中的代码

<div class="container">
<h1>All Articles</h1>
<hr>
<table class="table">
<thead>
    <tr>



<th>Sr.No</th>

    <th>Article Title</th>
    <th>Created On</th>
    </tr>
<tbody>
<?php if(count($articles)){
    $count=$this->uri->segment(3,0);    
        foreach($articles as $article){  

?>
<tr>



    <td><?=++$count;?></td>
    <td><?= $article->title?></td>
    <td><?= "Date"?></td>

</tr>
   <?php }?>

users.php 中的代码。这是“控制器”文件：

function search_articles(){
    $this->load->library('form_validation');
    $this->form_validation->set_rules('query','Query','required');
    if(!$this->form_validation->run())
    $this->index();
        $query=$this->input->post('query');
        return redirect("users/search_result/$query");}
  unction search_result($query){
    $this->load->helper('form');
    $this->load->model('articlesmodel');
    $this->load->library('pagination');

    $config=[
                'base_url'      =>  base_url("users/search_result/$query"),
                'per_page'      => 3,
                'total_rows'    =>$this->articlesmodel->count_search_result($query),
                'full_tag_open'     =>  '<ul class="pagination"> <a >',
                'full_tag_close'    =>  '</a></ul>',
                'next_tag_open'     =>  '<li class="page-item"><a>',
                'next_tag_close'    =>  '</a></li>',
                'prev_tag_open'     =>  '<li class="page-item"><a>',
                'prev_tag_close'    =>  '</a></li>',
                'num_tag_open'      =>  '<li class="page-item"><a>',
                'num_tag_close'     =>  '</a></li>',
                'cur_tag_open'      =>  '<li class="active"><a>',
                'cur_tag_close'     =>  '</a></li>',
    ];


    $articles=$this->articlesmodel->count_search_result($query,$config['per_page'],$this->uri->segment(4));
    $this->load->view('public/search_query_result',compact('articles'));
}

来自 articlesmodel.php 的代码。这是模型文件

function num_rows(){
      $user_id=$this->session->userdata('user_id');

      $query=$this->db
                      ->select(['title','id'])
                      ->from('articles')
                      ->where('user_id',$user_id)

                    ->  get();
             // print_r($query->result());
      return $query->num_rows();
    }

    function search_articles( $query){
     $q=  $this->db
                  ->from('articles')
                  ->like('title',$query)
                  ->limit($limit,$offset)
                  ->get();
          return $q->result();


    }
    function count_search_result($query){
      $q= $this->db->from('articles')
                    ->like('title',$query)

                    ->get();
          return $q->num_rows();
    }

Answer 1

查看您的代码，似乎count_search_result函数将返回num_rows并存储在$ articles变量中，并且您试图遍历该变量以回显$ article-> title，该标题不可用。

您必须在控制器行下更新

$articles=$this->articlesmodel->count_search_result($query,$config['per_page'],$this->uri->segment(4));

到

$articles=$this->articlesmodel->search_articles($query);

这将为您提供所需的文章表中的列值。

Answer 2

在（users.php）

我在控制器内部传递了错误的函数名。区别降低了……。

之前

$articles=$this->articlesmodel->count_search_result($query,$config['per_page'],$this->uri->segment(4));

之后

$articles=$this->articlesmodel->search_articles($query,$config['per_page'],$this->uri->segment(4));

这是区别

$articles=$this->articlesmodel->count_search_result更改为$articles=$this->articlesmodel->search_articles

为Codeigniter中的foreach（）提供了无效的参数

2 个答案: