[Feature request] Autocomplete methods from parent classes and namespace completion

[atrandafir]

I've been a NetBeans IDE (PHP version) user for a long time and now switching to Atom because I'm not sure of the future of NetBeans.

But I got very used to many of the features that NetBeans uses to help you with PHP development.

I've installed this extension and looks like control-click go to definition is working:

What I'm missing for now:

• Autocomplete on use statements with namespaces
• Autogenerated method on child class method that exists in parent class
  • Example: On Yii2 framework LoginForm extends Model and if I want to create the method attributeLabels, when I'm typing it it should prompt me with the parent method and autogenerate it.