A function to sort out letters, symbols, and anything beside numbers from phone numbers. Removes everything, but numbers from phone numbers. Used for numbers that are already entered in a database/array that need cleaning.

remove_fluff_phone_numbers.js

function cleanPhoneNumber(phoneString){

         //Use .match and regex to cut out the crap from the phone number
	match = phoneString.match(/\D*\(?(\d{3})?\)?\D*(\d{3})\D*(\d{4})\D*(\d{1,8})?/);
	
	//Assuming there are 3 parts... you can add more checks for arrays if you run into the issue of extensions.
	if(match[3] === 'undefined'){
		if(match[2] === 'undefined'){
			if(match[1] === 'undefined'){
			
			} else {
				//There is 1 part
				finalMatch = match[1];
			}
		} else {
			//There are 2 parts
			finalMatch = match[1] + match[2];
		}
	} else {
		//There are 3 parts
		finalMatch = match[1] + match[2] + match[3];
	}
	
	return finalMatch;
}