Submit get variable from url

I have two get 开发者_如何转开发variables in the url bar. I would like to take those variables and put them in a mysql database along with some other data. For some reason $data=$_GET[data] isnt working when i insert its value into a database. Is this the wrong way to take a get variable already set in the url bar? I have made sure that the get variable is already set and not null.

I think this may be the wrong way to pull down info from the url bar. Any suggestions?

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Can you post entire url, because sometimes the problem is there. Other than that, try with $data=$_GET["data"]