[Resolved] Read file to output in the browser (IE specific)

I'm looking for a method to embed the document in the browser (in IE). I have a

Code:

---

<?php
        require_once(dirname(__FILE__) . '/../../lib/lekoi/helper/WebHelper.php');
        $relativePathFilename = 'PFC-1000-6-5546.vsd';
        $filename = '/tmxpage/apache/htdocs/changecontrol/' . $relativePathFilename;
        $path = pathinfo($filename);
        header('Content-Type: ' . get_content_type($path['extension']));
        header('Content-Transfer-Encoding: binary');
        header('Content-Length: ' . filesize($filename));
        header('Content-Disposition: attachment; filename="' . basename($filename) . '"');
       
        @readfile($filename);
?>

---

But it'll open the document in another window. I want to show it like this.

Content-disposition: inline

Thanks PG.