AMFEXT is a PHP extension written in C that implements encoding and decoding
of AMF and AMF3 messages for the PHP language. It has been based on some of
the experience gained with AMFPP, a native code for encoding and decoding C.

The native encoding and decoding is extremely fast and memory efficient
respect existing PHP implementation, and the flexibility has been
provided using callbacks to the PHP code.

WWW: http://www.teslacore.it/wiki/index.php?title=AMFEXT