Dynamic URL in iframe in HTML field on About page

Hi

Regarding custom profile field type: HTML

Is it possible to use e.g PHP, Javascript or other in the HTML field? I would like to put a dynamic url in an iframe based on profilename. It is to embed an external individual booking system for each profile in the About page, without having to open another tab.

e.g

HTML field content:

<iframe src="http://booking.test2.behandlerforum.dk/schedule/"%username%"
" width="200" height=“800"></iframe>

Is this possible in some way, including coding overrides?

Thanks

Br
Peter