问题描述
我正在根据选定的员工 ID 生成一个 PDF 文件我在本地系统上遇到错误,同时仍在开发中,说致命错误:未捕获异常:FPDF 错误:一些数据已经输出,可以'不发送 PDF 文件(输出开始于 / 路径)
ob_start();
最后
ob_end_flush();
但是在将其托管到实时服务器后,再次抛出错误
在 PHP 脚本 Documentation Link
的开头引用了 FPDF 文档**ob_end_clean();
**
完整代码如下,
<?PHP
if (isset($_POST['pdfemployeeleave'])) {
ob_start();
require('MysqL_table.PHP');
$link = MysqLi_connect('localhost','root','','hr');
$empidinfo=$_REQUEST['empid'];
class PDF extends PDF_MysqL_Table
{
function Header()
{
// Title
$this->Image('img/prudentialshippinglines.png',15,6,15);
$this->SetFont('Arial',18);
$this->Cell(0,'Short Summary ',1,'C');
$this->Cell(0,' ','C');
$this->SetFont('Arial',15);
$this->Cell(0,'History Of Leaves Taken By The Employee','C');
$this->Ln(10);
// Ensure table header is printed
parent::Header();
}
}
// Connect to database
$pdf = new PDF('L','mm','A4');
//$pdf->AddPage();
// First table: output all columns
// $pdf->Table($link,'select * from employees where EMP_ID = 1');
$pdf->AddPage();
// Second table: specify 3 columns
$pdf->AddCol('Leave_Type',48,'Type');
$pdf->AddCol('LeaveSub_Type','Sub Type');
$pdf->AddCol('Start','Start');
$pdf->AddCol('End','End');
$pdf->AddCol('Remarks','Remarks');
$pdf->AddCol('Status','Status');
$prop = array('HeaderColor'=>array(255,150,100),'color1'=>array(210,245,255),'color2'=>array(255,255,210),'padding'=>2);
$pdf->Table($link,"select Leave_Type,LeaveSub_Type,Start,End,Remarks,Status from holiday where EMP_ID = '".$empidinfo."'",$prop);
//$pdf->Image('img/male.png',10,-300);
$fileName = "Leave Summary Of - ".$row['Name'].".pdf";
$pdf->Output($fileName,'D');
}
ob_end_flush();
?>
<?PHP
require('fpdf.PHP');
class PDF_MysqL_Table extends FPDF
{
protected $ProcessingTable=false;
protected $aCols=array();
protected $TableX;
protected $HeaderColor;
protected $RowColors;
protected $ColorIndex;
function Header()
{
// Print the table header if necessary
if($this->ProcessingTable)
$this->TableHeader();
}
function TableHeader()
{
$this->SetFont('Arial','B',12);
$this->SetX($this->TableX);
$fill=!empty($this->HeaderColor);
if($fill)
$this->SetFillColor($this->HeaderColor[0],$this->HeaderColor[1],$this->HeaderColor[2]);
foreach($this->aCols as $col)
$this->Cell($col['w'],$col['c'],'C',$fill);
$this->Ln();
}
function Row($data)
{
$this->SetX($this->TableX);
$ci=$this->ColorIndex;
$fill=!empty($this->RowColors[$ci]);
if($fill)
$this->SetFillColor($this->RowColors[$ci][0],$this->RowColors[$ci][1],$this->RowColors[$ci][2]);
foreach($this->aCols as $col)
$this->Cell($col['w'],5,$data[$col['f']],$col['a'],$fill);
$this->Ln();
$this->ColorIndex=1-$ci;
}
function CalcWidths($width,$align)
{
// Compute the widths of the columns
$TableWidth=0;
foreach($this->aCols as $i=>$col)
{
$w=$col['w'];
if($w==-1)
$w=$width/count($this->aCols);
elseif(substr($w,-1)=='%')
$w=$w/100*$width;
$this->aCols[$i]['w']=$w;
$TableWidth+=$w;
}
// Compute the abscissa of the table
if($align=='C')
$this->TableX=max(($this->w-$TableWidth)/2,0);
elseif($align=='R')
$this->TableX=max($this->w-$this->rMargin-$TableWidth,0);
else
$this->TableX=$this->lMargin;
}
function AddCol($field=-1,$width=-1,$caption='',$align='L')
{
// Add a column to the table
if($field==-1)
$field=count($this->aCols);
$this->aCols[]=array('f'=>$field,'c'=>$caption,'w'=>$width,'a'=>$align);
}
function Table($link,$query,$prop=array())
{
// Execute query
$res=MysqLi_query($link,$query) or die('Error: '.MysqLi_error($link)."<br>Query: $query");
// Add all columns if none was specified
if(count($this->aCols)==0)
{
$nb=MysqLi_num_fields($res);
for($i=0;$i<$nb;$i++)
$this->AddCol();
}
// Retrieve column names when not specified
foreach($this->aCols as $i=>$col)
{
if($col['c']=='')
{
if(is_string($col['f']))
$this->aCols[$i]['c']=ucfirst($col['f']);
else
$this->aCols[$i]['c']=ucfirst(MysqLi_fetch_field_direct($res,$col['f'])->name);
}
}
// Handle properties
if(!isset($prop['width']))
$prop['width']=0;
if($prop['width']==0)
$prop['width']=$this->w-$this->lMargin-$this->rMargin;
if(!isset($prop['align']))
$prop['align']='C';
if(!isset($prop['padding']))
$prop['padding']=$this->cMargin;
$cMargin=$this->cMargin;
$this->cMargin=$prop['padding'];
if(!isset($prop['HeaderColor']))
$prop['HeaderColor']=array();
$this->HeaderColor=$prop['HeaderColor'];
if(!isset($prop['color1']))
$prop['color1']=array();
if(!isset($prop['color2']))
$prop['color2']=array();
$this->RowColors=array($prop['color1'],$prop['color2']);
// Compute column widths
$this->CalcWidths($prop['width'],$prop['align']);
// Print header
$this->TableHeader();
// Print rows
$this->SetFont('Arial',11);
$this->ColorIndex=0;
$this->ProcessingTable=true;
while($row=MysqLi_fetch_array($res))
$this->Row($row);
$this->ProcessingTable=false;
$this->cMargin=$cMargin;
$this->aCols=array();
}
}
?>
据我检查,我没有留下任何空格或单词空格,并且还尝试设置以下内容
ob_clean();
ob_end_flush();
ini_set("session.auto_start",0);
文件也不包含BOM字符
解决方法
我将整个 fpdf 代码移到了 php 文档的顶部,现在它正在下载。未对代码进行任何更改