PHP: Una visión global

http://www.php.net

http://www.php.net/manual

http://www.php.net/dochowto

http://qa.php.net

http://pecl.php.net (PHP extensions)

http://pear.php.net

http://pear.php.net/packages.php

http://pear.php.net/manual

http://pear.php.net/group

http://bugs.php.net

http://news.php.net

http://cvs.php.net

http://www.php.net/cal.php

http://www.php.net/sites.php

http://www.php.net/books.php

http://www.php.net/links.php (tutoriales, revistas, etc.)