FPDF如何在文档中居中表

I am using FPDF to build pdf files via PHP. I want to make a centered cell with fractions. But I am unable to do so using Cell og multicell. Textbox also. Is there some way to achieve this? I could imaging that it is a table centered on the middle of the page. and then auto width makes it align in the middle. But I can't seem to achieve it with cells at the moment.

enter image description here

You can do that by create new extend class from fpdf which to write HTML code and save it as WriteHTML.php

<?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
        $html=str_replace("
",' ',$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);
    }
}
?>

You can created the pdf like sampe below

<?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();
?>

For more information about this writeHTML please visit http://www.fpdf.org/en/script/script41.php

Or you can try another similar writeHTML here http://www.fpdf.org/en/script/script42.php

OR another here http://www.fpdf.org/en/script/script50.php

It is easy when you want to center your paragraph / text when using HTML Code.

Hope this will help you.

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