我面临着获取特定ID的数据的问题。我希望用户获得链接以从按钮下载数据。这是mysqldatatable名称（add_courier）：
id | order_inv |名称|日期|项目数量|价格|付款方式。
现在，我可以获取所有ID的列表，但无法获取特定ID的发票。这是我的代码：
<?php
require('fpdf.php');
$con=mysqli_connect('localhost','root','');
mysqli_select_db($con,'lexipressdb');
class PDF extends FPDF {
function Header(){
$this->SetFont('Arial','B',15);
//dummy cell to put logo
//$this->Cell(12,0,'',0,0);
//is equivalent to:
$this->Cell(12);
//put logo
$this->Image('gift.jpg',10,10,10);
$this->Cell(100,10,'Invoice',0,1);
//dummy cell to give line spacing
//$this->Cell(0,5,'',0,1);
//is equivalent to:
$this->Ln(5);
$this->SetFont('Arial','B',11);
$this->SetFillColor(180,180,255);
$this->SetDrawColor(180,180,255);
$this->Cell(40,5,'Order Invoice',1,0,'',true);
$this->Cell(25,5,'Quantity',1,0,'',true);
$this->Cell(65,5,'Weight',1,0,'',true);
$this->Cell(60,5,'Cost',1,1,'',true);
}
function Footer(){
//add table's bottom line
$this->Cell(190,0,'','T',1,'',true);
//Go to 1.5 cm from bottom
$this->SetY(-15);
$this->SetFont('Arial','',8);
//width = 0 means the cell is extended up to the right margin
$this->Cell(0,10,'Page '.$this->PageNo()." / {pages}",0,0,'C');
}
}
//A4 width : 219mm
//default margin : 10mm each side
//writable horizontal : 219-(10*2)=189mm
$pdf = new PDF('P','mm','A4'); //use new class
//define new alias for total page numbers
$pdf->AliasNbPages('{pages}');
$pdf->SetAutoPageBreak(true,15);
$pdf->AddPage();
$pdf->SetFont('Arial','',9);
$pdf->SetDrawColor(180,180,255);
$query=mysqli_query($con,"select * from add_courier");
while($data=mysqli_fetch_array($query)){
$pdf->Cell(40,5,$data['order_inv'],'LR',0);
$pdf->Cell(25,5,$data['r_qnty'],'LR',0);
$pdf->Cell(60,5,$data['r_weight'],'LR',0);
$pdf->Cell(60,5,$data['r_costtotal'],'LR',1);
}
$pdf->Output();
?>
我希望每个ID都具有这样的格式，以便用户可以从链接中下载它：'
<?php
require('fpdf.php');
//A4 width : 219mm
//default margin : 10mm each side
//writable horizontal : 219-(10*2)=189mm
$pdf = new FPDF('P','mm','A4');
$pdf->AddPage();
//set font to arial, bold, 14pt
$pdf->SetFont('Arial','B',14);
//Cell(width , height , text , border , end line , [align] )
$pdf->Cell(130 ,5,'Lexipress.CO',0,0);
$pdf->Cell(59 ,5,'INVOICE',0,1);//end of line
//set font to arial, regular, 12pt
$pdf->SetFont('Arial','',12);
$pdf->Cell(130 ,5,'[Street Address]',0,0);
$pdf->Cell(59 ,5,'',0,1);//end of line
$pdf->Cell(130 ,5,'[City, Country, ZIP]',0,0);
$pdf->Cell(25 ,5,'Date',0,0);
$pdf->Cell(34 ,5,'[dd/mm/yyyy]',0,1);//end of line
$pdf->Cell(130 ,5,'Phone [+12345678]',0,0);
$pdf->Cell(25 ,5,'Invoice #',0,0);
$pdf->Cell(34 ,5,'[1234567]',0,1);//end of line
$pdf->Cell(130 ,5,'Fax [+12345678]',0,0);
$pdf->Cell(25 ,5,'Customer ID',0,0);
$pdf->Cell(34 ,5,'[1234567]',0,1);//end of line
//make a dummy empty cell as a vertical spacer
$pdf->Cell(189 ,10,'',0,1);//end of line
//billing address
$pdf->Cell(100 ,5,'Bill to',0,1);//end of line
//add dummy cell at beginning of each line for indentation
$pdf->Cell(10 ,5,'',0,0);
$pdf->Cell(90 ,5,'[Name]',0,1);
$pdf->Cell(10 ,5,'',0,0);
$pdf->Cell(90 ,5,'[Company Name]',0,1);
$pdf->Cell(10 ,5,'',0,0);
$pdf->Cell(90 ,5,'[Address]',0,1);
$pdf->Cell(10 ,5,'',0,0);
$pdf->Cell(90 ,5,'[Phone]',0,1);
//make a dummy empty cell as a vertical spacer
$pdf->Cell(189 ,10,'',0,1);//end of line
//invoice contents
$pdf->SetFont('Arial','B',12);
$pdf->Cell(130 ,5,'Description',1,0);
$pdf->Cell(25 ,5,'Taxable',1,0);
$pdf->Cell(34 ,5,'Amount',1,1);//end of line
$pdf->SetFont('Arial','',12);
//Numbers are right-aligned so we give 'R' after new line parameter
$pdf->Cell(130 ,5,'UltraCool Fridge',1,0);
$pdf->Cell(25 ,5,'-',1,0);
$pdf->Cell(34 ,5,'3,250',1,1,'R');//end of line
$pdf->Cell(130 ,5,'Supaclean Diswasher',1,0);
$pdf->Cell(25 ,5,'-',1,0);
$pdf->Cell(34 ,5,'1,200',1,1,'R');//end of line
$pdf->Cell(130 ,5,'Something Else',1,0);
$pdf->Cell(25 ,5,'-',1,0);
$pdf->Cell(34 ,5,'1,000',1,1,'R');//end of line
//summary
$pdf->Cell(130 ,5,'',0,0);
$pdf->Cell(25 ,5,'Subtotal',0,0);
$pdf->Cell(4 ,5,'$',1,0);
$pdf->Cell(30 ,5,'4,450',1,1,'R');//end of line
$pdf->Cell(130 ,5,'',0,0);
$pdf->Cell(25 ,5,'Taxable',0,0);
$pdf->Cell(4 ,5,'$',1,0);
$pdf->Cell(30 ,5,'0',1,1,'R');//end of line
$pdf->Cell(130 ,5,'',0,0);
$pdf->Cell(25 ,5,'Tax Rate',0,0);
$pdf->Cell(4 ,5,'$',1,0);
$pdf->Cell(30 ,5,'10%',1,1,'R');//end of line
$pdf->Cell(130 ,5,'',0,0);
$pdf->Cell(25 ,5,'Total Due',0,0);
$pdf->Cell(4 ,5,'$',1,0);
$pdf->Cell(30 ,5,'4,450',1,1,'R');//end of line
$pdf->Output();
?>
我不知道该怎么做。有人可以帮忙吗？我也检查了其他问题是否存在相同的问题，但我没有得到应有的重视。
$sql=mysqli_query($con,"select * from add_courier");
foreach loop starts here
<button > <a href="printme.php&id=<?php echo $row['id']?>">Print</a>
</button>
每个循环在这里结束
在您的FPDF页面中获得ID变量
//示例//
require('fpdf.php');
$con=mysqli_connect('localhost','root','');
mysqli_select_db($con,'lexipressdb');
$id=$_GET['id'];
在FPDF页面上用此更改您的查询
$query=mysqli_query($con,"select * from add_courier where id='$id'");
<table>
<thead>
<th style="font-weight:bold;">Tracking</th>
<th style="font-weight:bold;">Print Invoice</th>
</thead>
<tbody>
<?php
$ret=mysqli_query($con,"select *from add_courier");
$cnt=1;
while ($row=mysqli_fetch_array($ret)) {
?>
<tr>
<td style="font-weight:bold;"><?php echo $row['trackingid'];?>
</td>
<td>
<a href="invoice/generate_pdf.php?id=<?php echo $row['trackingid'];
//this is your tracking primary key column name
?>">Generate</a>
</td>
</tr>
<?php
}
?>
</tbody>
</table>
--------------------------------------------------------------------------------------------------------
generate_pdf.php代码
<?php
require('fpdf.php');
$con=mysqli_connect('localhost','root','');
mysqli_select_db($con,'lexipressdb');
$id=$_GET['id'];
//请先回显并检查id值
echo $id; exit;
//如果您单击生成链接时获得ID，则在上面的行中注释并享受
class PDF extends FPDF {
function Header(){
$this->SetFont('Arial','B',15);
//dummy cell to put logo
//$this->Cell(12,0,'',0,0);
//is equivalent to:
$this->Cell(12);
//put logo
$this->Image('gift.jpg',10,10,10);
$this->Cell(100,10,'Invoice',0,1);
//dummy cell to give line spacing
//$this->Cell(0,5,'',0,1);
//is equivalent to:
$this->Ln(5);
$this->SetFont('Arial','B',11);
$this->SetFillColor(180,180,255);
$this->SetDrawColor(180,180,255);
$this->Cell(40,5,'Order Invoice',1,0,'',true);
$this->Cell(25,5,'Quantity',1,0,'',true);
$this->Cell(65,5,'Weight',1,0,'',true);
$this->Cell(60,5,'Cost',1,1,'',true);
}
function Footer(){
//add table's bottom line
$this->Cell(190,0,'','T',1,'',true);
//Go to 1.5 cm from bottom
$this->SetY(-15);
$this->SetFont('Arial','',8);
//width = 0 means the cell is extended up to the right margin
$this->Cell(0,10,'Page '.$this->PageNo()." / {pages}",0,0,'C');
}
}
//A4 width : 219mm
//default margin : 10mm each side
//writable horizontal : 219-(10*2)=189mm
$pdf = new PDF('P','mm','A4'); //use new class
//define new alias for total page numbers
$pdf->AliasNbPages('{pages}');
$pdf->SetAutoPageBreak(true,15);
$pdf->AddPage();
$pdf->SetFont('Arial','',9);
$pdf->SetDrawColor(180,180,255);
$query=mysqli_query($con,"select * from add_courier where id='$id'");
while($data=mysqli_fetch_array($query)){
$pdf->Cell(40,5,$data['order_inv'],'LR',0);
$pdf->Cell(25,5,$data['r_qnty'],'LR',0);
$pdf->Cell(60,5,$data['r_weight'],'LR',0);
$pdf->Cell(60,5,$data['r_costtotal'],'LR',1);
}
$pdf->Output();
?>