I have PHP5 installed via macports in /opt/local/..the default location for macports. There's no portfile for pear. If I do a standard pear install from the pear site what directory location should pear be placed in to work with PHP?
While the curl option works, it won't update as you update your ports. An alternative:
sudo port install php5 +pear
This will install the variant of php5 with pear, in the same location as downloading above, and it will update as you update macports.