Configuring Include Paths

This feature is only supported in the Ultimate edition.

Include paths are used for code completion and reference resolution in some functions/methods that use file paths as arguments, for example, require() or include().

To configure include paths:

1. Open the Settings / Preferences Dialog by pressing Ctrl+Alt+S or by choosing File | Settings for Windows and Linux or IntelliJ IDEA | Preferences for macOS, and click PHP under Languages & Frameworks.
2. On the PHP page that opens, configure the list of include paths in the Include path area:
   • Use the   and buttons to add and remove paths.
   • Use the   and   buttons to change the order of items in the list.
   • Press the toogle button to have the paths sorted alphabetically in the ascending order.