Add autocomplete function parameters & PHP autocomplete

[StyleShit]

Hi,

I'm using Brackets for a long time and really like it.
However, I have some suggestions that I think most Brackets users will agree that will make Brackets even better 😄

Firstly, auto complete parameters:

I used Sublime Text for a while, and when you write a function like preg_replace and click the auto complete, it becomes something like:
preg_replace(pattern, replacement, subject)
The "pattern" is selected, and cursor is placed right there. When you start typing, the value is changed, and you can click Tab to go on for the next parameter.
I think it's really useful feature and most of Brackets users will like it.

Secondly, PHP auto complete:

Well, yes, I know that Brackets is a text editor for Front-End languages, but I think there are many developers, like me, who use Brackets also for Back-End languages such as PHP.
I hope you will add this autocomplete and put it in high priority because there are many developers who wait for this, and the extensions don't work well as the built in autocomplete.
I don't think it should be so hard because it is "just" adding a list of PHP functions to the autocomplete.
(hope i'm right)
BTW, it would be awesome to add also Wordpress and PHP Frameworks autocomplete.

Thank you very much for reading this, sorry for my bad English, and I'll be glad to see it in the next updates. 😄