Just like binding.pry in ruby on rails we can use IEx.pry in eixir/phoenix.
def fun_name(arguments) do
require IEx; IEx.pry
...
end
In order for this to work we need to start the server through IEx iex -S mix phoenix.server.
Also like we type exit in binding.pry to continu next process we can type respawn() in elixir.