How to process json response?

Question

PHP

I have this json response:

{"response":[{"id":1,"first_name":"Павел","last_name":"Дуров","city":{"id":2,"title":"Санкт-Петербург"}},{"id":7,"first_name":"Алексей","last_name":"Кобылянский","city":{"id":1,"title":"Москва"},"hidden":1}]}

How can I get both "first_name" parameters out of this response?

Answer 1

ideone.com/fFVHvf

Answer 2

Convert to array and pull