PHP While loop displaying only last row

问题

I'm using TCPDF library to generate PDF of a table .

Table has few number of rows say 10

Among that two rows has same invoice number "78650"

Now i am selecting by invoice number and as desired it should generate PDF with two rows.

But instead it is only fetching the second row that is the last row. That is Serial no 2 is only taken .

Code Below :

<?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');
?>

回答1:

That's because for iteration you're replacing the content of $html2. You will need to append the content instead.

So take the blank $html2 variable outside the loop and append the result as you iterate the loop.

Code would look something like this,

$html2="";
while($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++; 

}

回答2:

The second fetch overwrites the variable $html2. You can use an array $html2[$i].

回答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, '');

来源：https://stackoverflow.com/questions/39852813/php-while-loop-displaying-only-last-row

标签

php

mysql

while-loop

tcpdf