Navigating to the Source Code from the Debug Tool Window
To jump to the declaration of a variable or field, select the desired item in the Variables pane and press F4 or choose from the context menu.
Choose (Shift+F4 to navigate to the definition of the class of the selected variable or field. Suppose, you have
$my_car = new Car();. If you select
$my_car in the Variables pane, then choosing will bring you to
$my_car = new Car(); while choosing will bring you to