get_class_methods

• In PHP, get_class_methods is used in two different ways. The first way is to pass in a class name string to get the methods. We can get a list of the public instance methods defined on a class in Ruby using Object.instance_methods.

  PHP

  class Car {
      public function drive() {}
      private function brake() {}
  }
   
  $result = get_class_methods('Car');
  var_export($result);
  // => array (0 => 'drive')

  Ruby

  class Car
    def drive; end
   
    private
    def brake; end
  end
   
  p Car.instance_methods
  # => ["inspect", "clone", "method", ...]

  The other way is to pass in an object instance of the class to get the methods. We can get a list of methods for an object in Ruby using Object#methods.

  PHP

  $result = get_class_methods(new Car);
  var_export($result);
  // => array (1 => 'drive')

  Ruby

  p Car.new.methods
  # => ["inspect", "clone", "method", ...]

  In Ruby, all objects instances inherit from the a base Object, so we get a rather long list of methods — including our user defined methods.

  If we want to only see a list of user defined public methods, we can use the Enumerable#reject method to exclude all of the methods inherited from Object.

  Ruby

  p Car.new.methods.reject {|m| Object.methods.include?(m) }
  # => ["drive"]

  see also

  • get_class
  • get_class_vars
  • get_object_vars

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