How to upload data to execl or csv?

Question

PHP

I'm trying to export data from my database to an excel file (in execl or csv),
but I have problems with the export, the data is not loaded in csv.
https://4kpornindex.com/
php code

<?php  
 $connect = new PDO('mysql:host=localhost;dbname=123', '123', 'invoice123');
 $query ="SELECT * from tbl_order";  
 $result = mysqli_query($connect, $query);  
 ?>

html

<form method="post" action="export.php" align="center">  
                     <input type="submit" name="export" value="CSV Export" class="btn btn-success" />  
                </form>  
      <table id="data-table" class="table table-bordered table-striped">
        <thead>
          <tr style="background-color: cornflowerblue;">
            <th>Invoice No.</th>
            <th>Invoice Date</th>
            <th>Student Name</th>
            <th>Total Amount</th>
            <th>Total Amount</th>
            <th>Total Amount</th>
            <th>Total Amount</th>
            <th>Total Amount</th>
            <th>Total Amount</th>
            <th>Total Amount</th>

          </tr>
        </thead>
        <?php  
                     while($row = mysqli_fetch_array($result))  
                     {  
                     ?> 

              <tr>
                 <td><?php echo $row["order_id"]; ?></td>
                <td><?php echo $row["order_no"]; ?></td>
                <td><?php echo $row["order_date"]; ?></td>
                <td><?php echo $row["order_receiver_name"]; ?></td>
                <td><?php echo $row["order_total_before_tax"]; ?></td>
                <td><?php echo $row["order_total_tax1"]; ?></td>
                <td><?php echo $row["order_total_tax2"]; ?></td>
                <td><?php echo $row["order_total_tax"]; ?></td>
                <td><?php echo $row["order_total_after_tax"]; ?></td>
                <td><?php echo $row["order_datetime"]; ?></td>

              </tr>
                <?php       
                     }  
             ?> 

      </table>

    </div>
    <br>

export.php

<?php  
      //export.php  
 if(isset($_POST["export"]))  
 {  
      $connect = new PDO('mysql:host=localhost;dbname=123', '123', 'invoice123');
      header('Content-Type: text/csv; charset=utf-8');  
      header('Content-Disposition: attachment; filename=data.csv');  
      $output = fopen("php://output", "w");  
      fputcsv($output, array('
Invoice No.', 'Invoice Date', 'Student Name', 'Total Amount'));  
      $query = "SELECT * from tbl_order";  
      $result = mysqli_query($connect, $query);  
      while($row = mysqli_fetch_assoc($result))  
      {  
           fputcsv($output, $row);  
      }  
      fclose($output);  
 }  
 ?>

I need to view this data in my web page and also I need to export it.

Answer 1

https://stackoverflow.com/questions/4249432/export...