I18N_php is derived from two prior works, STPhp and LanguageSys. STPhp was written by Jacob Moorman (firstname.lastname@example.org) of the Marble Horse Free Software Group with contributions by Erich Zigler (email@example.com). LanguageSys was written by Florian Breit (firstname.lastname@example.org). I18N_php contains the rfc1766 Class (rfc1766.class.php), version 1.0.0. This code is used unchanged. No other code from LanguageSys is used. Special thanks to Pirjo Posio for her suggestions for improving this package.