string PEAR_PackageUpdate::determinePrefFile (
Returns the path to the preferences file.
The preferences file holds information about whether or not the user would
like to be notified about updates for individual packages. If the user is
on a Windows machine, the file will be in the
PEAR_CONFIG_SYSCONFIG directory and named
ppurc.ini. If the user is on any operating system, the
preferences file will be stored in the user's home directory as the file
This function can be called statically.
string - The full path to the preferences file.