FPDF - 组合字体样式

By using FPDF (multiCell) I'm not able to apply different tags for a simple word.

As an example:

<em><strong><u>Sample</u></strong></em>  

At the end it's shown in PDF only with underscore style (latest one). Is there any possibilities to combine them?

Not sure if you're using FPDF or TCPDF since FPDF'Multicell function doesn't seem to accept HTML, but with TCPDF an HTML string with multiples tags works:

$ishtml = true;
$test = '<em><strong><u>Sample</u></strong></em>';
$pdf->MultiCell($width, $height, $test, $border, '$align, $fill, $ln, $x, $y, $reseth, $stretch, $ishtml);

if you still want to use FPDF, you can write any HTML tags by using a simple functions like this below

<?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);
    }
}
?>

and you just write your HTML code by call that function, like this

<?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();
?>

See this HTML sample by FPDF and here the result

Hope it can help you and the others