Preheat oven to 375 degrees. Flatten crescent rolls onto a baking sheet and press seams together. Bake 10-12 minutes; set aside. Combine soup mix, mayonnaise, and sour cream. Add spinach, artichoke hearts, water chestnuts, garlic, and feta cheese. Spread mixture over crescent roll dough. Top with parmesan cheese. Bake 10-12 minutes. Cut into squares with a pizza cutter and serve hot.