Viewing Structure of a Source File/==》Ctrl+F12.

Viewing Structure of a Source File

You can examine the structure of the file currently opened in the editor using the Structure tool window or the Structure pop-up window.

By default, PhpStorm shows all the namespaces, classes, methods, and functions presented in the current file.

To have other members displayed, turn on the corresponding options on the context menu of the title bar of the Structure window.

You can also have class members shown in the Project tool window.

On this page:

Viewing the structure of a file
Displaying class fields
Displaying constants
Displaying inherited members
Displaying included files
Displaying class members in the Project tool window
To view the file structure, do one of the following

On the main menu, choose View | Tool Windows | Structure.
Pres StructureTool Button
Press Alt+7.
Press Ctrl+F12.
webidestructuretoolwindow.png
To have class fields displayed

Turn on the Show Fields option on the context menu of the title bar.
To have constants displayed

Turn on the Show Constants option on the context menu of the title bar.
To have inherited members displayed

Click Show Inherited option on the context menu of the title bar.
By default, PhpStorm shows only methods, constants, and fields defined in the current class. If shown, inherited members are displayed gray.

To have included files displayed

Turn on Show Includes option on the context menu of the title bar.
To have class members shown in the Project tool window

Turn on the Show members item on the context menu of the Project tool window title bar. If this option is on, the files in the tree that contain classes turn into nodes. When such node is unfolded, the contained classes with their fields, methods, functions and other members of the selected item are shown.
ps_projectToolWindowShowMembers

https://www.jetbrains.com/phpstorm/help/viewing-structure-of-a-source-file.html