Forum Moderators: coopster
>>a standard place to download exstensions to the php library?
PECL [pecl.php.net] and PEAR [pear.php.net] are great starting points.
PECL is a repository for PHP Extensions, providing a directory of all known extensions and hosting facilities for downloading and development of PHP extensions.
PEAR [pear.php.net] is a framework and distribution system for reusable PHP components.
Then, as you said, there are a boatload of open source classes available for just about anything you want to do. You'll find sourceforge.net a great place to locate those by keyword.