Config apache + PDFlib + wordpress

I’m having trouble installing PDFlib in my apache to use in my wordpress application.

I followed the tutorial PHP

I still did the following command, because I thought in another doubt about the installation:

echo "katleia.com.br localhost" | sudo tee /etc/apache2/conf-available/fqdn.conf
sudo a2enconf fqdn

It is katleia.com.br/worpress the route I put on my browser to access my page.

However when I give the command:

service apache2 restart

It’s the next exit with error:

 * Restarting web server apache2                                         [fail] 
 * The apache2 configtest failed.
Output of config test was:
AH00526: Syntax error on line 1 of /etc/apache2/conf-enabled/fqdn.conf:
Invalid command 'katleia.com.br', perhaps misspelled or defined by a module not included in the server configuration
Action 'configtest' failed.
The Apache error log may have more information.

Can someone help me configure PDFlib? because I’m about four hours trying to make it work in wordpress and has nothing to right.

Already I leave on notice not want to install a wordpress plugin.

UPDATE

To undo this command:

echo "katleia.com.br katleia" | sudo tee /etc/apache2/conf-available/fqdn.conf

UPDATE2

I managed to make him stop giving error but still does not work.

I did the following command in order to be able to restart the server:

echo "ServerName localhost" | sudo tee /etc/apache2/conf-available/fqdn.conf
sudo a2enconf fqdn
service apache2 restart

with this my server returned to work, I added this code in a php file that is named after the click on a button to test:

try{
    $pdf = new PDFlib();
} catch (Exception $e) {
  echo "error: ".$e->getMessage()."<br>";
} finally {
  // open a file 
    pdf_open_file($pdf, "test.pdf"); 
    // start a new page (A4) 
    pdf_begin_page($pdf, 595, 842); 
    // get and use a font object 
    $arial = pdf_findfont($pdf, "Arial", "host", 1); 
    pdf_setfont($pdf, $arial, 10); 
    // print text 
    pdf_show_xy($pdf, "There are more things in heaven and earth, Horatio,",50, 750); 
    pdf_show_xy($pdf, "than are dreamt of in your philosophy", 50,730); 
    // end page 
    pdf_end_page($pdf); 
    // close and save file 
    pdf_close($pdf);
}

He did not have any error, but when I try the file do not find anywhere.

UPDATE3

There is this command which in theory was to get an output showing that the PDFlib is running but it does not show anything when I do it on my prompt:

# php -i |grep PDF
PDFlib
PDFlib Support => enabled
PDFlib GmbH Binary-Version => 7.0.5p3

I could do this part to work was forgetting to add the extension = pdf.so the file /etc/php5/cli/php.ini. After I restarted the apache and he gave the expected output.

But still it does not appear the test.pdf anywhere.

UPDATE4

try {
    $p = new PDFlib();

    /*  open new PDF file; insert a file name to create the PDF on disk */
    if ($p->begin_document("", "") == 0) {
        die("Error: " . $p->get_errmsg());
    }

    $p->set_info("Creator", "hello.php");
    $p->set_info("Author", "Rainer Schaaf");
    $p->set_info("Title", "Hello world (PHP)!");

    $p->begin_page_ext(595, 842, "");

    $font = $p->load_font("Helvetica-Bold", "winansi", "");

    $p->setfont($font, 24.0);
    $p->set_text_pos(50, 700);
    $p->show("Hello world!");
    $p->continue_text("(says PHP)");
    $p->end_page_ext("");

    $p->end_document("");

    $buf = $p->get_buffer();
    $len = strlen($buf);

    header("Content-type: application/pdf");
    header("Content-Length: $len");
    header("Content-Disposition: inline; filename=teste_do_katleia.pdf");
    print $buf;
}
catch (PDFlibException $e) {
    die("PDFlib exception occurred in hello sample:n" .
    "[" . $e->get_errnum() . "] " . $e->get_apiname() . ": " .
    $e->get_errmsg() . "n");
}
catch (Exception $e) {
    die($e);
}

$p = 0;

$len = mb_strlen($buf, 'ASCII');
exit();

With the above code can generate a pdf and view it on the site, but that’s not what I want. What I want is to save it in a folder and then to recover on another page.
Does anyone know what I have to change this code to be able to do this?