FreeBSD ports安装php默认是没有安装pear库集的，需要另外安装：
cd /usr/ports/devel/pear
make install clean
rehash
然后通过pear安装HTTP_Upload库：
pear install HTTP_Upload
# pear install HTTP_Upload
downloading HTTP_Upload-0.9.1.tgz …
Starting to download HTTP_Upload-0.9.1.tgz (9,460 bytes)
…..done: 9,460 bytes
install ok: channel://pear.php.net/HTTP_Upload-0.9.1
安装完成之后，可以通过pear list查看已经安装了的pear库：
# pear list
Installed packages, channel pear.php.net:
=========================================
Package Version State
Archive_Tar 1.3.3 stable
Console_Getopt 1.2.3 stable
HTTP_Upload 0.9.1 stable
PEAR 1.9.0 stable
Structures_Graph 1.0.2 stable