Using the Column header to output values

[whobutsb]

I have a quick newbie question.
When I'm posting things to a database I like to use a foreach statement to place the field name as the field value. It looks like this:

//GET THE VALUES
		foreach($_POST as $varname=>$varvalue){
			if (empty($varvalue)) {
					$empty[$varname] = $varvalue;
				} else {
					$post[$varname] = $varvalue;
				}
			}

It works good so then all i have to do is right the name of variable and it will output that value.

My question is how would I do the same for a set of results that I receive from a mysql_query?

would it be something like this?

//GET THE VALUES
		foreach(mysql_fetch_array as $key=>$value){
			if (empty($value)) {
					$empty[$key] = $value
				} else {
					mysql_fetch_array[$key] = $value;
				}
			}

Thanks for the help?