The page is available only when the Phing Support plugin is enabled. The Phing Support plugin is not bundled with IntelliJ IDEA, but it can be installed on the Settings/Preferences | Plugins page as described in Installing plugins from JetBrains repository.
On this page, enable Phing integration in the current project.
|Path to Phing executable||In this text box, specify the location of the phing.bat file. Type the path manually or click Browse and choose the file location in the dialog box that opens.|