The dialog box opens when you click the Server paths mappings button in the Debug
area of the Run/Debug Configuration: PHP Web Application or Run/Debug Configuration: PHPUnit on Server
Use this dialog box to map folders on your local machine with folders on the server. These mappings are used during remote debugging and testing
as the basis for switching between a test or a stack trace of an exception or assertion and the corresponding source code.
IntelliJ IDEA detects these mappings automatically but still provides you with this possibility to specify them manually.