I'm a Rubyist but I find "the three top web languages of PHP, Ruby, and Python" odd. I'd suspect C# and Java (and possibly classic ASP?) are still more heavily used in webapps overall than Python or Ruby. A reasonable counterargument could be that C# and Java aren't primarily used for webapps, but then neither is Python(?)
My interpretation wasn't entirely unfair. The "for" and double "of" result in an ambiguous meaning. "top" is most commonly a superlative, similar to "best" or "most popular", as in "the three best actors". But you used it in a different sense, as in "three top actors" (though this doesn't usually work with "the" before it.)
I do see where you're coming from though and what you intended so this is mostly linguistic wankery for a good Friday night in ;-)