Write HTML

Add-On 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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Es ist ein Fehler aufgetreten

Was ist das Problem?

Bei der Ausführung des Skriptes ist ein Fehler aufgetreten. Irgendetwas funktioniert nicht richtig.

Wie kann ich das Problem lösen?

Öffnen Sie die aktuelle Log-Datei im Ordner var/logs bzw. app/logs und suchen Sie die zugehörige Fehlermeldung (normalerweise die letzte).

Weitere Informationen

Die Skriptausführung wurde gestoppt, weil irgendetwas nicht korrekt funktioniert. Die eigentliche Fehlermeldung wird aus Sicherheitsgründen hinter dieser Meldung verborgen und findet sich in der aktuellen Log-Datei (siehe oben). Wenn Sie die Fehlermeldung nicht verstehen oder nicht wissen, wie das Problem zu beheben ist, durchsuchen Sie die Contao-FAQs oder besuchen Sie die Contao-Supportseite.