Rails Parameter Filters

param_filters.rb

# run from the console of your Rails project

param_filter = ActionDispatch::Http::ParameterFilter.new([:foo, :bar])
param_filter.filter("foo" => "hi")  # => {"foo"=>"[FILTERED]"}
param_filter.filter("BAR" => "123")  # => {"BAR"=>"[FILTERED]"}
param_filter.filter("Food" => "nachos")  # => {"Food"=>"[FILTERED]"}
param_filter.filter("hobart" => "australia")  # => {"hobart"=>"[FILTERED]"}