How to generate pdf file with php web page?

Hi all,

How to generate pdf file with php web page?
Do we need to install any external tools on server or clients?

Thanks in advance.

http://php.net/pdf

Thank you for your reply, Perturbatio.
According to PDFlib,
http://www.pdflib.com/
to use php.net/pdf , we need to buy pdflib

1. Did anyone try fpdf or php-pdf?
2. Could basic web hosting plan use fpdf or php-pdf?

Thanks in advance.

http://fpdf.org/