1. certain function that I would except to should up with intellisense( code insight )don't example: require, require_once
2. is there a way to tell the editor to get rid of the the intellisense( code insight ) box if it finds no matched because it being there with no options is just a pain

the first question is not so important but i would really like an answer to the second one because that is become really annoying.

I'm not sure what you mean. Could you please post screenshots and/or examples?

The thing is when this comes up with nothing, after i finish my new variable i have to hit space 2 times to get 1 space printed. I want like code sense to work like Zend STudio or visual Studio, they both eliminate that box if it finds nothing. I think that is good because why even show the box if there is nothing there, i mean it does not help anything.

Probably you set "Min characters" to 1 in Tools->Settings->Code Insight.
In this case code completion drop down triggers when you type just $ and shows you all available variables for the context. At least superglobals are always there, so the list is not empty. You proceeded with typing and got $sd. Looks like there were no variables with sd in the beginning found and the list became empty telling you so.
If you press space at this point, it will be passed to the editor. I'm not sure why you'd need to hit space 2 times. Just one is enough to get code completion dropdown off and have a space in the editor.

it seems to be working fine now.