PHP Resolver library used to communicate with a DNS server

Net_DNS2 - Native PHP5 DNS Resolver and Updater

The main features for this package include:
* Increased performance; most requests are 2-10x faster than Net_DNS
* Near drop-in replacement for Net_DNS
* Uses PHP5 style classes and exceptions
* Support for IPv4 and IPv6, TCP and UDP sockets.
* Includes a separate, more intuitive Updater class for handling dynamic update
* Support zone signing using TSIG and SIG(0) for updates and zone transfers
* Includes a local cache using shared memory or flat file to improve performance
* includes many more RR's, including DNSSEC RR's.