How to create a PDF files

[eluser]Techno Heart[/eluser]
function hello_world()
.{
$this->load->library('cezpdf');

$this->cezpdf->ezText('Hello World', 12, array('justification' => 'center'));
$this->cezpdf->ezSetDy(-10);

$content = 'The quick, brown fox jumps over a lazy dog. DJs flock by when MTV ax quiz prog.
Junk MTV quiz graced by fox whelps. Bawds jog, flick quartz, vex nymphs.';

$this->cezpdf->ezText($content, 10);

$this->cezpdf->ezStream();
}


the above example is from codeigniter forum.

here u can see they are creating pdf using a library called 'cezpf'. $content text will be created in pdf in this function.if i want to include some extenal file along with this $content what i have to do..? got it.?