I just signed up with a codio account today and after doing my research this has to be my favourite cloud IDE option. Coming from a phpStorm and symfony background a lot of my work is with PHP classes. A feature I found extremely valuable was phpStorm's generation of class getters and setters using the class properties. It saves heaps of time and makes working with classes a lot easier.
Because I am new however I do understand this feature may already be included in the IDE.. if so I will shut up and be happy