ขอความช่วยเหลือครับเรื่อง html table to pdf คือผมได้ศึกษาจาก www.fpdf.org และตัวอย่างจากในเวปนี้แล้ว แต่ก็ติดปัญหาอยู่ที่ตารางที่มีการผสานเซล

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

class PDF_HTML_Table extends FPDF
{
var $B;
var $I;
var $U;
var $HREF;

function PDF($orientation='P',$unit='mm',$format='A4')
{
	//Call parent constructor
	$this->FPDF($orientation,$unit,$format);
	//Initialization
	$this->B=0;
	$this->I=0;
	$this->U=0;
	$this->HREF='';
}

function WriteHTML2($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);
			else
				$this->Write(5,$e);
		}
		else
		{
			//Tag
			if($e{0}=='/')
				$this->CloseTag(strtoupper(substr($e,1)));
			else
			{
				//Extract attributes
				$a2=explode(' ',$e);
				$tag=strtoupper(array_shift($a2));
				$attr=array();
				foreach($a2 as $v)
					if(ereg('^([^=]*)=["\']?([^"\']*)["\']?$',$v,$a3))
						$attr[strtoupper($a3[1])]=$a3[2];
				$this->OpenTag($tag,$attr);
			}
		}
	}
}

function OpenTag($tag,$attr)
{
	//Opening tag
	if($tag=='B' or $tag=='I' or $tag=='U')
		$this->SetStyle($tag,true);
	if($tag=='A')
		$this->HREF=$attr['HREF'];
	if($tag=='BR')
		$this->Ln(5);
	if($tag=='P')
		$this->Ln(10);
}

function CloseTag($tag)
{
	//Closing tag
	if($tag=='B' or $tag=='I' or $tag=='U')
		$this->SetStyle($tag,false);
	if($tag=='A')
		$this->HREF='';
	if($tag=='P')
		$this->Ln(10);
}

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);
}

function WriteTable($data,$w)
{
	$this->SetLineWidth(.3);
	$this->SetFillColor(255,255,255);
	$this->SetTextColor(0);
	$this->SetFont('');
	foreach($data as $row)
	{
		$nb=0;
		for($i=0;$i<count($row);$i++)
			$nb=max($nb,$this->NbLines($w[$i],trim($row[$i])));
		$h=5*$nb;
		$this->CheckPageBreak($h);
		for($i=0;$i<count($row);$i++)
		{
			$x=$this->GetX();
			$y=$this->GetY();
			$this->Rect($x,$y,$w[$i],$h);
			$this->MultiCell($w[$i],5,trim($row[$i]),0,'C');
			//Put the position to the right of the cell
			$this->SetXY($x+$w[$i],$y);					
		}
		$this->Ln($h);

	}
}

function NbLines($w,$txt)
{
	//Computes the number of lines a MultiCell of width w will take
	$cw=&$this->CurrentFont['cw'];
	if($w==0)
		$w=$this->w-$this->rMargin-$this->x;
	$wmax=($w-2*$this->cMargin)*1000/$this->FontSize;
	$s=str_replace("\r",'',$txt);
	$nb=strlen($s);
	if($nb>0 and $s[$nb-1]=="\n")
		$nb--;
	$sep=-1;
	$i=0;
	$j=0;
	$l=0;
	$nl=1;
	while($i<$nb)
	{
		$c=$s[$i];
		if($c=="\n")
		{
			$i++;
			$sep=-1;
			$j=$i;
			$l=0;
			$nl++;
			continue;
		}
		if($c==' ')
			$sep=$i;
		$l+=$cw[$c];
		if($l>$wmax)
		{
			if($sep==-1)
			{
				if($i==$j)
					$i++;
			}
			else
				$i=$sep+1;
			$sep=-1;
			$j=$i;
			$l=0;
			$nl++;
		}
		else
			$i++;
	}
	return $nl;
}

function CheckPageBreak($h)
{
	//If the height h would cause an overflow, add a new page immediately
	if($this->GetY()+$h>$this->PageBreakTrigger)
		$this->AddPage($this->CurOrientation);
}

function ReplaceHTML($html)
{
	$html = str_replace( '<li>', "\n<br> - " , $html );
	$html = str_replace( '<LI>', "\n - " , $html );
	$html = str_replace( '</ul>', "\n\n" , $html );
	$html = str_replace( '<strong>', "<b>" , $html );
	$html = str_replace( '</strong>', "</b>" , $html );
	$html = str_replace( '&#160;', "\n" , $html );
	$html = str_replace( '&nbsp;', " " , $html );
	$html = str_replace( '&quot;', "\"" , $html ); 
	$html = str_replace( '&#39;', "'" , $html );
	return $html;
}

function ParseTable($Table)
{
	$_var='';
	$htmlText = $Table;
	$parser = new HtmlParser ($htmlText);
	while ($parser->parse()) {
		if(strtolower($parser->iNodeName)=='table')
		{
			if($parser->iNodeType == NODE_TYPE_ENDELEMENT)
				$_var .='/::';
			else
				$_var .='::';
		}

		if(strtolower($parser->iNodeName)=='tr')
		{
			if($parser->iNodeType == NODE_TYPE_ENDELEMENT)
				$_var .='!-:'; //opening row
			else
				$_var .=':-!'; //closing row
		}
		if(strtolower($parser->iNodeName)=='td' && $parser->iNodeType == NODE_TYPE_ENDELEMENT)
		{
			$_var .='#,#';
		}
		if ($parser->iNodeName=='Text' && isset($parser->iNodeValue))
		{
			$_var .= $parser->iNodeValue;
		}
	}
	$elems = split(':-!',str_replace('/','',str_replace('::','',str_replace('!-:','',$_var)))); //opening row
	foreach($elems as $key=>$value)
	{
		if(trim($value)!='')
		{
			$elems2 = split('#,#',$value);
			array_pop($elems2);
			$data[] = $elems2;
		}
	}
	return $data;
}

function WriteHTML($html)
{
	$html = $this->ReplaceHTML($html);
	//Search for a table
	$start = strpos(strtolower($html),'<table');
	$end = strpos(strtolower($html),'</table');
	if($start!==false && $end!==false)
	{
		$this->WriteHTML2(substr($html,0,$start).'<BR>');

		$tableVar = substr($html,$start,$end-$start);
		$tableData = $this->ParseTable($tableVar);
		for($i=1;$i<=count($tableData[0]);$i++)
		{
			if($this->CurOrientation=='L')
				$w[] = abs(120/(count($tableData[0])-1))+24;
			else
				$w[] = abs(120/(count($tableData[0])-1))+5;
		}
		$this->WriteTable($tableData,$w);

		$this->WriteHTML2(substr($html,$end+8,strlen($html)-1).'<BR>');
	}
	else
	{
		$this->WriteHTML2($html);
	}
}

}
?>

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

$htmlTable='<TABLE>
<TR>
<TD>S. No.</TD>
<TD colspan="2">Name</TD>
<TD>Age</TD>
<TD>Sex</TD>
<TD>Location</TD>
</TR>

<TR>
<TD>1</TD>
<TD>Azeem</TD>
<TD>24</TD>
<TD>Male</TD>
<TD>Pakistan</TD>
</TR>

<TR>
<TD>2</TD>
<TD>Atiq</TD>
<TD>24</TD>
<TD>Male</TD>
<TD>Pakistan</TD>
</TR>

<TR>
<TD>3</TD>
<TD>Shahid</TD>
<TD>24</TD>
<TD>Male</TD>
<TD>Pakistan</TD>
</TR>

<TR>
<TD>4</TD>
<TD>Roy Montgome</TD>
<TD>36</TD>
<TD>Male</TD>
<TD>USA</TD>
</TR>

<TR>
<TD>5</TD>
<TD>M.Bony</TD>
<TD>18</TD>
<TD>Female</TD>
<TD>&nbsp;</TD>
</TR>
</TABLE>';

$pdf=new PDF_HTML_Table();
$pdf->AddPage();
$pdf->SetFont('Arial','',10);
$pdf->WriteHTML("Start of the HTML table.<BR>$htmlTable<BR>End of the table.");
$pdf->Output();
?>