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problem with using dompdf

#1
[eluser]Unknown[/eluser]
Hello,

I found "PDF generation using dompdf" in the wiki and though it would be very useful to my application.

I followed the instructions in the wiki...
renamed the folder the same,
put it in the same plugins directory,
created the plugin "to_pdf_pi.php" the same,

I did slightly change the controller...

Code:
function itinerys()
{
    $this->load->helper('file');
        
    $this->load->plugin('to_pdf');
    // page info here, db calls, etc.    
    $html = $this->load->view('home', $data=false, true);
    pdf_create($html, 'filename');
}

The problem come when i run it i get the following errors...

Code:
A PHP Error was encountered
Severity: Warning
Message: DOMXPath::query() [function.DOMXPath-query]: Invalid expression
Filename: include/stylesheet.cls.php
Line Number: 573

A PHP Error was encountered
Severity: Warning
Message: DOMXPath::query() [function.DOMXPath-query]: Invalid expression
Filename: include/stylesheet.cls.php
Line Number: 573

A PHP Error was encountered
Severity: Warning
Message: Invalid argument supplied for foreach()
Filename: include/stylesheet.cls.php
Line Number: 575

Unable to stream pdf: headers already sent

I'm guessing the "Unable to stream pdf: headers already sent" come up because of the other errors but can anyone help me with the other error? I've search these forums but i can't find the same problem anywhere else.

Thanks very much

Durham

#2
[eluser]Unknown[/eluser]
I've found an answer to this myself in the dompdf forums.

The problem is with css in html i was trying to convert as it is unsupported by dompdf.

To get rid of the problem just get rid of the problem css.

Hope this helps others,

Durham

#3
[eluser]Jauhari[/eluser]
Can you give me more detail information?

#4
[eluser]Unknown[/eluser]
Hai,

I found “PDF generation using dompdf” in the wiki and though it would be very useful to my application.

I followed the instructions in the wiki…
renamed the folder the same,
put it in the same plugins directory,
created the plugin “to_pdf_pi.php” the same,




the controller


<?php
//require_once('basecontroller.php');
class Membercert extends Controller {

function Membercert()
{
parent::Controller();
}

function index()
{
$this->load->library('rapyd');
$this->load->view('membercert');

}

function pdf()
{

$this->load->plugin('to_pdf');
$this->load->helper('file');


// page info here, db calls, etc.

$html = $this->load->view('membercert/pdf', $data, true);
pdf_create($html, 'filename');


}

plugin


<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
function pdf_create($html, $filename, $stream=TRUE)
{
require_once("dompdf/dompdf_config.inc.php");

$dompdf = new DOMPDF();
$dompdf->load_html($html);
$dompdf->render();
if ($stream) {
$dompdf->stream($filename.".pdf");
} else {
write_file("./invoices_temp/invoice_$filename.pdf", $dompdf->output()Wink;
}
}
?>


the view


<html>
<head>
<title>Cetak Sijil Keahlian</title>

<style type="text/css">

body {
background-color: #fff;
margin: 40px;
font-family: Arial, Lucida Grande, Verdana, Sans-serif;
font-size: 12px;
color: #4F5155;
}

a {
color: #003399;
background-color: transparent;
font-weight: normal;
}

h1 {
color: #444;
background-color: transparent;
border-bottom: 1px solid #D0D0D0;
font-size: 16px;
font-weight: bold;
margin: 24px 0 2px 0;
padding: 5px 0 6px 0;
}

code {
font-family: Arial, Monaco, Verdana, Sans-serif;
font-size: 12px;
background-color: #f9f9f9;
border: 1px solid #D0D0D0;
color: #002166;
display: block;
margin: 14px 0 14px 0;
padding: 12px 10px 12px 10px;
}

</style>
</head>
<body>

<div align="center">&lt;!-- <h2>&nbsp;</h2> --&gt;
<div style="position: absolute; width: 763px; height: 76px; z-index: 3; left: 95px; top: 74px" id="layer5">
<font size="5"><strong>Kumpulan Wang Khairat Pekerja dan Pesara TNB</strong></font><br>
&lt;!-- <img src="&lt;?php echo base_url()?&gt;application/images/logo/logotnb.png" align="absmiddle"><br> --&gt;
<font size="1">(8592-U)</font><br><br><br><br><p><i><u><font size="4">Sijil Keahlian</font></u></i></p></div>
</div>

<p align="center">&nbsp;</p>

<div style="position: absolute; width: 762px; height: 100px; z-index: 2; left: 95px; top: 230px" id="layer4">
<font size="3"><p style="line-height: 150%" align="justify">Adalah disahkan bahawa <strong>&lt;?php echo $nama ?&gt;</strong> (Nombor Pekerja: <strong>&lt;?php echo $noPekerja ?&gt;</strong> dan Nombor K/P: <strong>&lt;?php echo $noIC ?&gt;</strong>) telah diterima menjadi seorang <strong>&lt;?php echo $jenisAhliDesc ?&gt;</strong> Kumpulan Wang Khairat Pekerja dan Pesara TNB berkuatkuasa mulai <strong>&lt;?php echo $tarikhMasuk ?&gt;</strong> dengan Nombor Ahli: <strong>&lt;?php echo $jenisAhliCode.$ahliKhairatID ?&gt;</strong>.</p></font>
</div>

<div style="position: absolute; width: 155px; height: 100px; z-index: 1; left: 95px; top: 370px" id="layer1">
<font size="2"><p align="center">........................<br>Tarikh</p></font>
</div>

<div style="position: absolute; width: 155px; height: 100px; z-index: 1; left: 692px; top: 370px" id="layer3">
<font size="2"><p align="center">........................<br>Setiausaha</p></font>
</div>

<div style="position: absolute; width: 155px; height: 100px; z-index: 1; left: 497px; top: 370px" id="layer2">
<font size="2"><p align="center">........................<br>Pengerusi</p></font>
</div>

&lt;/body&gt;
&lt;/html&gt;


...but not display as pdf file..
is that anything error thru' my coding
appreciate if u can help me...
thank you...

#5
[eluser]Unknown[/eluser]
I also encountered the "Invalid expression" error, what fixed it for me was to remove the comments inside the STYLE tag:

From:

Code:
&lt;style type="text/css"&gt;
&lt;!--

body { font-family: helvetica }

--&gt;
&lt;/style&gt;

To:

Code:
&lt;style type="text/css"&gt;

body { font-family: helvetica }

&lt;/style&gt;

#6
[eluser]Unknown[/eluser]
Hi folks,

I encountered the same problem and andyrut gave the good trick!

#7
[eluser]splendidus[/eluser]
Hi everybody!

I had the same "Invalid Expression" Problem.
I have my styles in a separate css-file, which I link to my php-file.

After several hours of searching and trying, I finally found 'the' solution in my case.
The key words are: character encoding, UTF-8, BOM.

My editor added a BOM (http://unicode.org/faq/utf_bom.html#BOM) at the beginning of my css-file, while saving it using a UTF-8 encoding.
It was not visible in the editor, but the DOMPDF read it as a '' directly prior to my first style element 'body', and 'body' is indeed an invalid expression.

Hope this helps somebody...

#8
[eluser]Eric Cope[/eluser]
[quote author="splendidus" date="1234338022"]Hi everybody!

I had the same "Invalid Expression" Problem.
I have my styles in a separate css-file, which I link to my php-file.

After several hours of searching and trying, I finally found 'the' solution in my case.
The key words are: character encoding, UTF-8, BOM.

My editor added a BOM (http://unicode.org/faq/utf_bom.html#BOM) at the beginning of my css-file, while saving it using a UTF-8 encoding.
It was not visible in the editor, but the DOMPDF read it as a '' directly prior to my first style element 'body', and 'body' is indeed an invalid expression.

Hope this helps somebody...[/quote]

I am having this very problem. How did you solve it?

Edit: I changed the encoding of a view file from UTF-8 to Western Latin-1.

#9
[eluser]splendidus[/eluser]
In the settings of my editor there was an option, where I could select which types of files should be saved with BOM, and which without.
In notepad++ for example, there is besides UTF-8 also the option "UTF-8 without BOM"
(Settings > Options > New/Open/Save)

#10
[eluser]ClaudioBasckeira[/eluser]
I'm having the same error message, only i simply not using any CSS! Any clues?


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