$PHING_HOME
  |-- bin
  |-- classes
  |    `-- phing
  |         |-- filters
  |         |    `-- util
  |         |-- mappers
  |         |-- parser
  |         |-- tasks
  |         |    |-- ext
  |         |    |-- system
  |         |    |    `-- condition
  |         |    `-- user
  |         `-- types
  |-- docs
  |    `-- phing_guide
  `-- test
       |-- classes
       `-- etc