Question

嗨，我正在尝试过滤表格，然后将过滤后的表格打印为pdf。

我输入了其他代码，但这已经接近完成了。

我尝试了其他解决方案，但似乎无法修复。

如果您对如何操作有任何建议，请说。任何帮助都会很棒。

帮助大家！预先感谢！

这是reports.php

<?php 
ob_start(); 
include ('filters.php');
  function fetch_data()  
  {  
  require('filters.php');
  $output = '';  
  $conn = mysqli_connect("localhost", "root", "", "trans");  
  $sql = "SELECT * FROM customers ORDER BY created_at ASC";  
  $result = mysqli_query($conn, $sql);  
  while($row = mysqli_fetch_array($result))  
  {       
  $output .= '<tr>  
                      <td>'.$row["id"].'</td>  
                      <td>'.$row["first_name"].'</td>  
                      <td>'.$row["last_name"].'</td>  
                       <td>'.$row["email"].'</td>  
                      <td>'.$row["created_at"].'</td>  
                 </tr>  
                      ';  
  }  
  return $output;  
  }    if(isset($_POST["generate_pdf"]))  
 {  
  require_once('tcpdf/tcpdf.php');  
  $obj_pdf = new TCPDF('P', PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', 
  false);  
  $obj_pdf->SetCreator(PDF_CREATOR);  
  $obj_pdf->SetTitle("Customer Transactions Report");  
  $obj_pdf->SetHeaderData('', '', PDF_HEADER_TITLE, PDF_HEADER_STRING);  
  $obj_pdf->setHeaderFont(Array(PDF_FONT_NAME_MAIN, '', 
  PDF_FONT_SIZE_MAIN));  
  $obj_pdf->setFooterFont(Array(PDF_FONT_NAME_DATA, '', 
  PDF_FONT_SIZE_DATA));  
  $obj_pdf->SetDefaultMonospacedFont('helvetica');  
  $obj_pdf->SetFooterMargin(PDF_MARGIN_FOOTER);  
  $obj_pdf->SetMargins(PDF_MARGIN_LEFT, '10', PDF_MARGIN_RIGHT);  
  $obj_pdf->setPrintHeader(false);  
  $obj_pdf->setPrintFooter(false);  
  $obj_pdf->SetAutoPageBreak(TRUE, 10);  
  $obj_pdf->SetFont('helvetica', '', 11);  
  $obj_pdf->AddPage();  
  $content = '';  
  $content .= '  
  <h4 align="center">Customer Transactions Report for Viaje</h4><br /> 
  <table border="1" cellspacing="0" cellpadding="3">  
       <tr>  
            <th width="26%">ID</th>  
            <th width="15%">First Name</th>  
            <th width="15%">Last Name</th>  
            <th width="33%">Email</th>  
            <th width="13%">Order Date</th>  
       </tr>  
  ';  
  $content .= fetch_data();  
  $content .= '</table>';  
  $obj_pdf->writeHTML($content);  
  $obj_pdf->Output('file.pdf', 'I');  
  exit();

 }  
 ?>  
 <!DOCTYPE html>  
 <html>  
  <head>  

       <script 
src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>  
       <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" />  
       <script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>  
       <link rel="stylesheet" href="http://code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">  
  </head>  
  <body>  
       <br /><br />  

       <div class="container" style="width:900px;">  
            <h2 align="center">Showings Customer Transactions</h2>  <br><br><br><BR><BR>

            <div class="col-md-3">  
                 <input type="text" name="from_date" id="from_date" class="form-control" placeholder="From Date" />  
            </div>  
            <div class="col-md-3">  
                 <input type="text" name="to_date" id="to_date" class="form-control" placeholder="To Date" />  
            </div>  
            <div class="col-md-5">  
                <form method="post">  
                  <input type="button" name="filter" id="filter" value="Filter" class="btn btn-info" />  

                  <input type="submit" name="generate_pdf" class="btn btn-success" value="Print" />  
                </form>
            </div>  
            <div style="clear:both"></div>                 
            <br />  
            <div id="order_table">  

                 <table class="table table-bordered">  
                      <tr>  
                           <th width="5%" >ID</th>  
                           <th width="30%" >First Name</th>  
                           <th width="43%" >Last Name</th>  
                           <th width="10%" >Email</th>  
                           <th width="12%" >Order Date</th>  
                      </tr>
                <?php  
                 echo fetch_data();  
                 ?>  



                 </table>  

            </div>  
       </div>  

  </body>  

  <script>  
  $(document).ready(function(){  
       $.datepicker.setDefaults({  
            dateFormat: 'yy-mm-dd'   
       });  
       $(function(){  
            $("#from_date").datepicker();  
            $("#to_date").datepicker();  
       });  
       $('#filter').click(function(){  
            var from_date = $('#from_date').val();  
            var to_date = $('#to_date').val();  
            if(from_date != '' && to_date != '')  
            {  
                 $.ajax({  
                      url:"filters.php",  
                      method:"POST",  
                      data:{from_date:from_date, to_date:to_date},  
                      success:function(data)  
                      {  
                           $( '#order_table').html(data);  
                      }  
                 });  
            }  
            else  
            {  
                 alert("Please Select Date");  
            }  
       });  
  });

这是filters.php

 <?php  

 if(isset($_POST["from_date"], $_POST["to_date"]))  
 {  
  $connect = mysqli_connect("localhost", "root", "", "trans");  
  $output = '';  

  $query = "  
       SELECT * FROM customers  
       WHERE cast(created_at as date) BETWEEN '".$_POST["from_date"]."'  AND 
  '".$_POST["to_date"]."'  
  ";  

  $result = mysqli_query($connect, $query);  
  $output .= '  
       <table class="table table-bordered">  
            <tr>  
                 <th width="5%">ID</th>  
                 <th width="30%">First Name</th>  
                 <th width="43%">Last Name</th>  
                 <th width="10%">Email</th>  
                 <th width="12%">Order Date</th>  
            </tr>  
  ';  
  if(mysqli_num_rows($result) > 0)  
  {  
       while($row = mysqli_fetch_array($result))  
       {  
            $output .= '  
                 <tr>  
                      <td>'. $row["id"] .'</td>  
                      <td>'. $row["first_name"] .'</td>  
                      <td>'. $row["last_name"] .'</td>  
                      <td>$ '. $row["email"] .'</td>  
                      <td>'. $row["created_at"] .'</td>  
                 </tr>  
            ';  
       }  
  }  
  else  
  {  
       $output .= '  
            <tr>  
                 <td colspan="5">No Order Found</td>  
            </tr>  
       ';  
  }  
  $output .= '</table>';  
  echo $output;  
 }  
 ?>

Answer 1

您要使用的$_POST变量仅在您发送帖子本身后定义。第一次加载此页面时，其中没有任何内容，因此query()将不存在，因此，您将看到此错误。

在这种情况下，如果表单仍未发送任何内容，则应在查询中强制使用您要使用的日期。

截至：

$fromDate = isset($_POST["from_date"]) ? $_POST["from_date"] : date('Y-m-d');
$untilDate = isset($_POST["to_date"]) ? $_POST["to_date"] : date('Y-m-d', strtotime('+5 days'));

if (isset($fromDate, $untilDate)) {...}

尽管，正如每个人都指出的那样，不建议使用。

我还建议您阅读以下内容：https://www.phptherightway.com/ 几年前对我有很大帮助。

如何过滤表格然后将输出打印为pdf

1 个答案: