php - 在codeigniter中使用html2pdf导出pdf时foreach错误数组

Question

我以前从未在 v2 下的 Codeigniter 中导出到 PDF MySQL。但是当我切换到 v3.1.0 时，在 foreach 中导出到 PDF 时出现问题，出了什么问题？

错误

A PHP Error was encountered

Severity: Notice

Message: Undefined offset: 1

Filename: html2pdf/html2pdf.class.php

Controller

public function print_data(){
    ob_start();
    $class= $this->uri->segment(3); 
    $data = array(
                    'get_data' => $this->My_model->detail_id_data($class)
    );  
    $this->load->view('print_detail_data', $data);
    $html = ob_get_contents();
    ob_end_clean();
     
    require_once('./assets/html2pdf/html2pdf.class.php');
    $pdf = new HTML2PDF('P', 'A4', 'en', true, 'UTF-8', 3);
    $pdf->WriteHTML($html);
    $pdf->Output('id_detail.pdf');
}

Models

    function detail_id_data($class) {
        $query = $this->db->select('*')
                          ->from('tb_student')
                          ->where('class', $id_data)
                          ->get();
                          
        if ($query->num_rows() > 0) {
            foreach ($query->result() as $data) {
                $hasil[] = $data;
            }
            return $hasil;
        } 
    }

观看次数

<table style="width: 100%; border: solid 1px black;">
    <thead>
      <tr>
        <th>ID</th>
        <th>Name </th>
        <th>Class</th>
        <th>Study</th>
      </tr> 
    </thead>    
    <tbody> 
    <?php 
        $no=1;
        foreach ($get_data as $row){    
    ?>
      <tr>
        <td><?php $no; ?></td>
        <td><?php echo $row->name; ?></td>
        <td><?php echo $row->class; ?></td>
        <td><?php echo $row->study; ?>f</td>        
      </tr>   
    <?php $no++; } ?>  
    </tbody>
</table>

Answer 1

在模型中使用row()而不是result()..希望它能起作用。

if ($query->num_rows() > 0) {
            foreach ($query->row()) as $data) {
                $hasil[] = $data;
            }
            return $hasil;
        }

像这样改变你的观点......

<table style="width: 100%; border: solid 1px black;">
    <thead>
      <tr>
        <th>ID</th>
        <th>Name </th>
        <th>Class</th>
        <th>Study</th>
      </tr> 
    </thead>    
    <tbody> 
    <?php 
        $no=1;
        foreach ($get_data as $row){    
    ?>
      <tr>
        <td><?php $no; ?></td>
        <td><?php echo $row['name']; ?></td>
        <td><?php echo $row['class']; ?></td>
        <td><?php echo $row['study']; ?>f</td>        
      </tr>   
    <?php $no++; } ?>  
    </tbody>
</table>

在 Controller 中，

更换它..

 $data = array(
                    'get_data' => $this->My_model->detail_id_data($class)
    );

由

$data['get_data'] = $this->My_model->detail_id_data($class);

您是否获得了 $class 的值。请尝试以下操作

echo $class;