Exercise : Address Book, Server-Side (by Alex Miller)

Write the PHP code to manage an address book using JSON. You are given the HTML and JS. The JS code sends requests to your addressbook.php web service that reads and saves address data. (sample solution) (solution) Write the PHP file, addressbook.php, that provides the following behavior:

• A GET request to addressbook.php with no parameters outputs an array of names:

  {"names": ["Suzie", "Billy", ...]}

• A GET request with a name parameter outputs that person's address:

  {"name": "Billy", "address": "123 4th St."}

• A POST request with a name and address parameter saves that person in the address book.

You may assume that any necessary parameters are passed and are in valid formats.