ANDI GUTMANS co-created PHP 3 and all versions since. A member of the PHP core team, he is one of the world¿s most highly regarded PHP developers.
STIG SÆTHER BAKKEN, also a member of the PHP core team, created PEAR: PHP Extension and Application Repository, the framework and global distribution system for reusable PHP components. Gutmans and Bakken are members of the PHP Hall of Fame.
DERICK RETHANS is a PHP code contributor and leader of the PHP QA team.