View preferences

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

class PDF_ViewPref extends FPDF {

protected $DisplayPreferences = '';

function DisplayPreferences($preferences) {
    $this->DisplayPreferences = $preferences;
}

function _putcatalog()
{
    parent::_putcatalog();
    if(is_int(strpos($this->DisplayPreferences,'FullScreen')))
        $this->_put('/PageMode /FullScreen');
    if($this->DisplayPreferences) {
        $this->_put('/ViewerPreferences<<');
        if(is_int(strpos($this->DisplayPreferences,'HideMenubar')))
            $this->_put('/HideMenubar true');
        if(is_int(strpos($this->DisplayPreferences,'HideToolbar')))
            $this->_put('/HideToolbar true');
        if(is_int(strpos($this->DisplayPreferences,'HideWindowUI')))
            $this->_put('/HideWindowUI true');
        if(is_int(strpos($this->DisplayPreferences,'DisplayDocTitle')))
            $this->_put('/DisplayDocTitle true');
        if(is_int(strpos($this->DisplayPreferences,'CenterWindow')))
            $this->_put('/CenterWindow true');
        if(is_int(strpos($this->DisplayPreferences,'FitWindow')))
            $this->_put('/FitWindow true');
        $this->_put('>>');
    }
}
}
?>

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

$pdf=new PDF_ViewPref();
$pdf->SetDisplayMode('fullpage');
$pdf->DisplayPreferences('HideMenubar,HideToolbar,HideWindowUI');
$pdf->AddPage();
$pdf->SetFont('Arial','',16);
$pdf->Write(6,'Only the document should appear, no interface elements.');
$pdf->Output();
?>