REGEX Recipe Ingredient Decode

Hello, I am looking for somebody to write a regex script/function that will decode recipe ingredients into Ingredient, Modifiers, Amount, Unit. The problem is that not all recipes have the ingredients in the same format ex: 1 avocado // no units (assume each) also no modifiers 2 cups all purpose flour, sifted // has everything olive oil // no amount, units, nor modifiers brown sugar 2.5 cups // reversed, no modifier brown sugar 2 1/2 cups // mixed number brown sugar 2½ cups //mixed number with special char 2 #10 cans of tomato soup tomato soup #10 can I am hoping to have this written in php and if possible to have comments included to edit myself if I find a format not covered. I know it cannot be perfect and will not catch all cases, could it give me an error flag if not found. I can include a list of all units and modifiers I know of to assist.