Great newbie Here.

I can use php to find a pattern from a string.
I want this string to be the source code of an HTML page on which I have no control (it does not belong to me).
This because the HTML page shows me text, but behind there are informations .... not really hidden ... just in the code.

How to get the source code ?

Javascript ? Java ?

I intend to use php just after, to treat the found data, but of course if you suggest I remain in javascript to treat the strings ...