Feature Request: Code Action for a existing empty php file. like PHPActor

[ravenp1992]

Creating classes is one of the most general actions we perform:

• Create a new file.
• Code the namespace, ensuring that it is compatible with the autoloading scheme.
• Code the class name, ensuring that it is the same as the file name.

This refactoring will perform steps 1, 2 and 3 for:

• Any given file name.
• Any given class name.
• A class name under the cursor.

[bmewburn]

Duplicate of #2748