Generally arguments passed into constructors are stored in properties to be used by the rest of the class. PhpStorm can create these properties from the constructor's method signature with only a few key strokes.
Place the cursor anywhere in the constructor's argument list and press Alt+Enter to invoke the intention actions menu then select Initialize fields. You will be prompted to choose which fields you want to initialize; you can select one or more fields, or press Ctrl/Cmd+A to select every field in the list.
PhpStorm will create a new private property for every chosen field and name it after it's corresponding argument, as well as initialize it with a value. It will also set up docblocks and try to identify the field's data type on your behalf.