Write HTML

Informations

Author: Clément Lavoillotte
License: FPDF

Description

This is an enhancement of the WriteHTML() method from tutorial 6. Supported tags are:

<b> <i> <u> (as well as <strong> and <em>)
<a href="...">
<p> <br> (<tr> and <blockquote> treated like <br>)
<img src="..." width="..." [height="..."]>
<font face="..." color="...">

Source

<?php
//HTML2PDF by Clément Lavoillotte
//ac.lavoillotte@noos.fr
//webmaster@streetpc.tk
//http://www.streetpc.tk

require('fpdf.php');

//function hex2dec
//returns an associative array (keys: R,G,B) from
//a hex html code (e.g. #3FE5AA)
function hex2dec($couleur = "#000000"){
    $R = substr($couleur, 1, 2);
    $rouge = hexdec($R);
    $V = substr($couleur, 3, 2);
    $vert = hexdec($V);
    $B = substr($couleur, 5, 2);
    $bleu = hexdec($B);
    $tbl_couleur = array();
    $tbl_couleur['R']=$rouge;
    $tbl_couleur['V']=$vert;
    $tbl_couleur['B']=$bleu;
    return $tbl_couleur;
}

//conversion pixel -> millimeter at 72 dpi
function px2mm($px){
    return $px*25.4/72;
}

function txtentities($html){
    $trans = get_html_translation_table(HTML_ENTITIES);
    $trans = array_flip($trans);
    return strtr($html, $trans);
}
////////////////////////////////////

class PDF_HTML extends FPDF
{
//variables of html parser
protected $B;
protected $I;
protected $U;
protected $HREF;
protected $fontList;
protected $issetfont;
protected $issetcolor;

function __construct($orientation='P', $unit='mm', $format='A4')
{
    //Call parent constructor
    parent::__construct($orientation,$unit,$format);
    //Initialization
    $this->B=0;
    $this->I=0;
    $this->U=0;
    $this->HREF='';
    $this->fontlist=array('arial', 'times', 'courier', 'helvetica', 'symbol');
    $this->issetfont=false;
    $this->issetcolor=false;
}

function WriteHTML($html)
{
    //HTML parser
    $html=strip_tags($html,"<b><u><i><a><img><p><br><strong><em><font><tr><blockquote>"); //supprime tous les tags sauf ceux reconnus
    $html=str_replace("\n",' ',$html); //remplace retour à la ligne par un espace
    $a=preg_split('/<(.*)>/U',$html,-1,PREG_SPLIT_DELIM_CAPTURE); //éclate la chaîne avec les balises
    foreach($a as $i=>$e)
    {
        if($i%2==0)
        {
            //Text
            if($this->HREF)
                $this->PutLink($this->HREF,$e);
            else
                $this->Write(5,stripslashes(txtentities($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 $v)
                {
                    if(preg_match('/([^=]*)=["\']?([^"\']*)/',$v,$a3))
                        $attr[strtoupper($a3[1])]=$a3[2];
                }
                $this->OpenTag($tag,$attr);
            }
        }
    }
}

function OpenTag($tag, $attr)
{
    //Opening tag
    switch($tag){
        case 'STRONG':
            $this->SetStyle('B',true);
            break;
        case 'EM':
            $this->SetStyle('I',true);
            break;
        case 'B':
        case 'I':
        case 'U':
            $this->SetStyle($tag,true);
            break;
        case 'A':
            $this->HREF=$attr['HREF'];
            break;
        case 'IMG':
            if(isset($attr['SRC']) && (isset($attr['WIDTH']) || isset($attr['HEIGHT']))) {
                if(!isset($attr['WIDTH']))
                    $attr['WIDTH'] = 0;
                if(!isset($attr['HEIGHT']))
                    $attr['HEIGHT'] = 0;
                $this->Image($attr['SRC'], $this->GetX(), $this->GetY(), px2mm($attr['WIDTH']), px2mm($attr['HEIGHT']));
            }
            break;
        case 'TR':
        case 'BLOCKQUOTE':
        case 'BR':
            $this->Ln(5);
            break;
        case 'P':
            $this->Ln(10);
            break;
        case 'FONT':
            if (isset($attr['COLOR']) && $attr['COLOR']!='') {
                $coul=hex2dec($attr['COLOR']);
                $this->SetTextColor($coul['R'],$coul['V'],$coul['B']);
                $this->issetcolor=true;
            }
            if (isset($attr['FACE']) && in_array(strtolower($attr['FACE']), $this->fontlist)) {
                $this->SetFont(strtolower($attr['FACE']));
                $this->issetfont=true;
            }
            break;
    }
}

function CloseTag($tag)
{
    //Closing tag
    if($tag=='STRONG')
        $tag='B';
    if($tag=='EM')
        $tag='I';
    if($tag=='B' || $tag=='I' || $tag=='U')
        $this->SetStyle($tag,false);
    if($tag=='A')
        $this->HREF='';
    if($tag=='FONT'){
        if ($this->issetcolor==true) {
            $this->SetTextColor(0);
        }
        if ($this->issetfont) {
            $this->SetFont('arial');
            $this->issetfont=false;
        }
    }
}

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);
}

}//end of class
?>

Example

This example allows to enter some HTML code in a form and generate the corresponding PDF:
<?php
require('html2pdf.php');

if(isset($_POST['text']))
{
    $pdf=new PDF_HTML();
    $pdf->SetFont('Arial','',12);
    $pdf->AddPage();
    $pdf->WriteHTML($_POST['text']);
    $pdf->Output();
    exit;
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>HTML2PDF</title>
<style type="text/css">
input, textarea {
    font-family: lucida console;
    font-size: 9pt;
    border: 1px solid #B0B0B0;
}
body {
    font-family: lucida console;
    font-size: 9pt;
    background-color: #F0F0F0;
}
</style>
</head>
<body>
<h1>HTML2PDF</h1>
<div style="border: 1px solid black">
Supported tags are the following:
<ul type="square">
<li>&lt;br&gt; and &lt;p&gt;</li>
<li>&lt;b&gt;, &lt;i&gt; and &lt;u&gt;</li>
<li>&lt;img&gt; (src and width (or height) are mandatory)</li>
<li>&lt;a&gt; (href is mandatory)</li>
<li>&lt;font&gt;: possible attributes are
<ul>
<li>color: hex color code</li>
<li>face: available fonts are: arial, times, courier, helvetica, symbol</li>
</ul>
</li>
</ul>
To display these tags without interpreting them, use &amp;lt; and &amp;gt;
</div><br>
<form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>" target="_blank">
Content:<br>
<textarea name="text" cols="80" rows="15"></textarea><br><br>
<input type="submit" value="Generate PDF">
</form>
</body>
</html>
With this code:

<font face="times">The </font><b><font color="#7070D0">FPDF</font></b><font face="times"> logo:</font>
<br><br>
<img src="logo.png" width="104">


you get this result.

Download

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