PHP while 循环只显示最后一行

Question

我正在使用 TCPDF 库生成 table 的 PDF。

Table 行数很少，比如 10

其中两行发票号相同"78650"

现在我按发票编号选择，并且根据需要它应该生成两行。

但它只获取 第二行 ，即最后一行。也就是只拍了2号.

代码如下：

<?php
require_once('TCPDF/tcpdf.php');
$pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);
$pdf->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED);
$pdf->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM);

if (@file_exists(dirname(__FILE__).'/lang/eng.php')) {
require_once(dirname(__FILE__).'/lang/eng.php');
$pdf->setLanguageArray($l);
}
$pdf->SetFont('helvetica', '', 9);
$pdf->AddPage();

$html1 = '<table  cellspacing="0" class="table table-striped">
<tr>

<th>SL No.</th>

<th>Product</th>
<th>Description</th>
<th>Qty</th>
<th>Total</th>
</tr>';

$sql = ("select * from invoice WHERE invoice_no = 78650 ORDER BY invoice_id ASC");
$result=mysqli_query($connection,$sql);
$i = 1;
while($row = mysqli_fetch_array($result)){
$pr = $row['product'];  
$dr = $row['description'];  
$qty = $row['qty']; 
$total = $row['total']; 

$html2 =  "<tr>

<td>".$i."</td>                         
<td>".$pr."</td>
<td>".$dr."</td>
<td>".$qty."</td>
<td>".$total."</td>
</tr>";

$i++; } 

$sql_1 = ("select *,SUM(total)as tot from invoice WHERE invoice_no = 78650 GROUP BY invoice_no");
$result_1=mysqli_query($connection,$sql_1);
$row_1 = mysqli_fetch_array($result_1);
$tot = $row_1['tot']; 
$html3 =    "<tr>
<td></td>

<td></td>
<td></td>
<td>Total: </td>
<td>".$tot."</td>
</tr>                       
</table>";
$html = $html1.$html2.$html3;
$pdf->writeHTML($html, true, 0, true, 0);
$pdf->lastPage();
$pdf->Output('htmlout.pdf', 'I');
?>

Answer 1

那是因为对于迭代，您要替换 $html2 的内容。您将需要附加内容。

因此，将空白 $html2 变量放在循环之外，并在迭代循环时追加结果。

代码看起来像这样，

$html2="";
while($row = mysqli_fetch_array($result)){
$pr = $row['product'];  
$dr = $row['description'];  
$qty = $row['qty']; 
$total = $row['total']; 

$html2 = $html2."<tr>
<td>".$i."</td>                         
<td>".$pr."</td>
<td>".$dr."</td>
<td>".$qty."</td>
<td>".$total."</td>
</tr>";

$i++; 

}

Answer 2

第二次获取覆盖变量 $html2。您可以使用数组 $html2[$i].

Answer 3

$tbl_header = '<table border="1"><tr>
        <th>FirstName</th><th>LastName</th><th>Gender</th><th>E-Mail</th><th>Mobile</th><th>DateOfBirth</th><th>Country</th><th>State</th><th>City</th><th>Address</th><th>Zipcode</th><th>File</th></tr>';
$tbl_footer = '</table>';

$tbl = '';
 while($row = mysqli_fetch_array($result)) 
   {  
$tbl .= '
<tr><td>'.$row['firstname'].'</td><td>'.$row["lastname"].'</td><td>'.$row["sex"].'</td><td>'.$row["email"].'</td><td>'.$row["mobile"].'</td><td>'.$row["dob"].'</td><td>'.$row["country"].'</td><td>'.$row["state"].'</td><td>'.$row["city"].'</td><td>'.$row["address"].'</td>  
<td>'.$row["zipcode"].'</td>
<td><img src="'.$row["file"].'"/></td>
</tr>
';

}
//$pdf->writeHTML($html, true, false, true, false, '');
$pdf->writeHTML($tbl_header . $tbl . $tbl_footer, true, false, false, false, '');

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