can someone help make this downloadable as a pdf?

[a01020304]

I have a php script that allows you to input your name and then create a certificate, this part works fine but wish the completed certificate to be downloaded as a pdf.
I have searched many forums and sites but cannot figure out how to do this and am very confused and baffled.

The php live version can be seen at
http://gmdesign.org.uk/xxx

the script is at http://gmdesign.org.uk/xxx/script.zip

i dont understand php at all, that script took me 4 months and extremely stressful, so need help or i will go mad

script.zip

[sneakyimp]

PHP has native PDF library, but it is probably one of the most elaborate libraries available in PHP. PDF documents are complex and support a lot of features. A quick search yield a lot of HTML-to-PDF options.