Parameters as array in Yaml in Symfony2
Try this
parameters: array_name3: - [1, 2, 3] - [a, b, c] - [x, y, z]
Or if you want to have it associative:
parameters: array_name3: 1: [1, 2, 3] 2: [a, b, c] bla: [x, y, z]
Or if you want more - read documentation