How do I work with the alphavantage API to fetch the currency exchange data using either JSON or php? : https://www.alphavantage.co/query?function=CURRENCY_EXCHANGE_RATE&from_currency=USD&to_currency=JPY&apikey=demo

DATA AS FOLLOWS:-
	
Realtime Currency Exchange Rate	
1. From_Currency Code	"USD"
2. From_Currency Name	"United States Dollar"
3. To_Currency Code	"JPY"
4. To_Currency Name	"Japanese Yen"
5. Exchange Rate	"108.99000000"
6. Last Refreshed	"2020-01-28 14:27:02"
7. Time Zone	"UTC"
8. Bid Price	"108.99000000"
9. Ask Price	"108.99000000"