Phing has a PEAR Channel
Phing now has a PEAR channel server, which makes Phing that much easier to install -- and that much easier to have as a dependency for other PEAR-installed packages.
You need to add the channel to your PEAR installation, using the channel-discover command:
$> pear channel-discover pear.phing.info
Then you can install (or update) Phing by referring to the channel/package (in this case the only package is phing):
$> pear install phing/phing
