php - 如何在 fpdf 中对齐文本

Question

我们正在使用 FPDF 制作 PDF 格式的报告。我们正在使用 pdf 报告中的文本$pdf->WriteHTML(utf8_decode($main));，现在我们想证明报告中的文本，但我们不能这样做。

请为此提出解决方案。

谢谢！

Answer 1

本教程向您展示如何使用WriteHTML.

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

演示

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();
?>

Answer 2

使用基于标签的格式化脚本。我不使用 PDF_HTML 类，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();