0
Example of how to declare in php:
Array
(
[0] => http://i.vimeocdn.com/video/637696211_200x150.jpg
[1] => http://i.vimeocdn.com/video/637696227_200x150.jpg
[2] => http://i.vimeocdn.com/video/637696217_200x150.jpg
[3] => http://i.vimeocdn.com/video/637696211_200x150.jpg
)
In JSON this would be a string with this format:
[
 "http://i.vimeocdn.com/video/637696211_200x150.jpg", 
 "http://i.vimeocdn.com/video/637696227_200x150.jpg", 
 "http://i.vimeocdn.com/video/637696217_200x150.jpg",
 "http://i.vimeocdn.com/video/637696211_200x150.jpg"
 ]
– Sergio
The question was just that? or are you looking for something else with this array?
– Sergio
I wanted to build a json array with explicit index, like the example
– Humberto Lopes
You want to build a array with explicit indexes, but informs that a response that builds an object without explicit indexes was what it wanted? That did not make much sense, so I voted to close the question as insufficiently clear.
– Woss