如何证明文件在fpdf

Question

我们正在使用FPDF在PDF格式的报告。 我们通过使用$pdf->WriteHTML(utf8_decode($main));来获取我们的pdf报告中的文本，现在我们想要在报告中证明文本的正确性，但我们无法做到这一点。

请为此提出解决方案。

谢谢！

Answer 1

使用Tag-based formatting脚本。我不使用类PDF_HTML，这样只有“脏”的解决方案：

<?php 
require('fpdf.php'); 
class PDF_HTML extends FPDF { 
... 
    elseif($this->ALIGN == 'center') 
     $this->Cell(0,5,$e,0,1,'C'); 
    elseif($this->ALIGN == 'justify') { 
     //$this->SetStyle("p","arial","N",7,"0,0,0"); //TODO 
     $this->WriteTag(180, 11, $e, 0, "J");// TODO parameters 
    } else 
... 
} 
class PDF_WriteTag extends PDF_HTML { 
... 
} 

ob_start(); // TODO delete after correcting any errors (only for demo) 
$pdf = new PDF_WriteTag(); 
$pdf->AddPage(); 
$pdf->SetFont('Arial'); 
$pdf->WriteHTML('You can<br><p align="center">center a line</p>and add a horizontal rule:<br><hr>'); 
$pdf->WriteHTML('You can<br><p align="justify">Et magnis dis parturient montes, nascetur ridiculus mus. Pellentesque vitae erat. Vivamus porttitor cursus lacus. Pellentesque tellus. Nunc aliquam interdum felis. Nulla imperdiet leo. Mauris hendrerit, sem at mollis pharetra, leo sapien pretium elit, a faucibus sapien dolor vel pede. Vestibulum et enim ut nulla sollicitudin adipiscing. Suspendisse malesuada venenatis mauris. Curabitur ornare mollis velit. Sed vitae metus. Morbi posuere mi id odio. Donec elit sem, tempor at, pharetra eu, sodales sit amet, elitCurabitur urna tellus, aliquam vitae, ultrices eget, vehicula nec, diam. Integer elementum, felis non faucibus euismod, erat massa dictum eros, eu ornare ligula tortor et mauris. Cras molestie. 
</p>and add a horizontal rule:<br><hr>'); 
ob_clean(); //TODO delete after correcting any errors 
$pdf->Output(); 

Answer 2

本教程介绍了如何使用WriteHTML证明。

http://www.fpdf.org/en/script/script41.php

demo

代码：

<?php 
require('fpdf.php'); 

class PDF_HTML extends FPDF 
{ 
    var $B=0; 
    var $I=0; 
    var $U=0; 
    var $HREF=''; 
    var $ALIGN=''; 

    function WriteHTML($html) 
    { 
     //HTML parser 
     $html=str_replace("\n",' ',$html); 
     $a=preg_split('/<(.*)>/U',$html,-1,PREG_SPLIT_DELIM_CAPTURE); 
     foreach($a as $i=>$e) 
     { 
      if($i%2==0) 
      { 
       //Text 
       if($this->HREF) 
        $this->PutLink($this->HREF,$e); 
       elseif($this->ALIGN=='center') 
        $this->Cell(0,5,$e,0,1,'C'); 
       else 
        $this->Write(5,$e); 
      } 
      else 
      { 
       //Tag 
       if($e[0]=='/') 
        $this->CloseTag(strtoupper(substr($e,1))); 
       else 
       { 
        //Extract properties 
        $a2=explode(' ',$e); 
        $tag=strtoupper(array_shift($a2)); 
        $prop=array(); 
        foreach($a2 as $v) 
        { 
         if(preg_match('/([^=]*)=["\']?([^"\']*)/',$v,$a3)) 
          $prop[strtoupper($a3[1])]=$a3[2]; 
        } 
        $this->OpenTag($tag,$prop); 
       } 
      } 
     } 
    } 

    function OpenTag($tag,$prop) 
    { 
     //Opening tag 
     if($tag=='B' || $tag=='I' || $tag=='U') 
      $this->SetStyle($tag,true); 
     if($tag=='A') 
      $this->HREF=$prop['HREF']; 
     if($tag=='BR') 
      $this->Ln(5); 
     if($tag=='P') 
      $this->ALIGN=$prop['ALIGN']; 
     if($tag=='HR') 
     { 
      if(!empty($prop['WIDTH'])) 
       $Width = $prop['WIDTH']; 
      else 
       $Width = $this->w - $this->lMargin-$this->rMargin; 
      $this->Ln(2); 
      $x = $this->GetX(); 
      $y = $this->GetY(); 
      $this->SetLineWidth(0.4); 
      $this->Line($x,$y,$x+$Width,$y); 
      $this->SetLineWidth(0.2); 
      $this->Ln(2); 
     } 
    } 

    function CloseTag($tag) 
    { 
     //Closing tag 
     if($tag=='B' || $tag=='I' || $tag=='U') 
      $this->SetStyle($tag,false); 
     if($tag=='A') 
      $this->HREF=''; 
     if($tag=='P') 
      $this->ALIGN=''; 
    } 

    function SetStyle($tag,$enable) 
    { 
     //Modify style and select corresponding font 
     $this->$tag+=($enable ? 1 : -1); 
     $style=''; 
     foreach(array('B','I','U') as $s) 
      if($this->$s>0) 
       $style.=$s; 
     $this->SetFont('',$style); 
    } 

    function PutLink($URL,$txt) 
    { 
     //Put a hyperlink 
     $this->SetTextColor(0,0,255); 
     $this->SetStyle('U',true); 
     $this->Write(5,$txt,$URL); 
     $this->SetStyle('U',false); 
     $this->SetTextColor(0); 
    } 
} 
?> 

用法：

<?php 
require('WriteHTML.php'); 

$pdf=new PDF_HTML(); 
$pdf->AddPage(); 
$pdf->SetFont('Arial'); 
$pdf->WriteHTML('You can<br><p align="center">center a line</p>and add a horizontal rule:<br><hr>'); 
$pdf->Output(); 
?>