file:// — Accessing local filesystem
   file:// is the default wrapper used with PHP and
   represents the local filesystem.
   When a relative path is specified (a path which does not begin with
   /, \, \\, or a
   Windows drive letter) the path provided will be applied against the current
   working directory. In many cases this is the directory in which the script
   resides unless it has been changed. Using the CLI
   SAPI, this defaults to the directory from which the
   script was called.
  
   With some functions, such as fopen() and
   file_get_contents(), include_path
   may be optionally searched for relative paths as well.
  
