PEAR RHEL4

What PHP PEAR packages are installed on a default RHEL4 system?

A vanilla RHEL4 system which has had it's PHP5 installed from the Red Hat Web Application Stack 1.0 Beta (for ES v. 4 x86) channel via up2date -i php contains pear. You can see what modules are installed using the built-in pear command:

$ pear list
Installed packages, channel pear.php.net:
=========================================
Package        Version State
Archive_Tar    1.3.1   stable
Console_Getopt 1.2     stable
PEAR           1.4.6   stable
XML_RPC        1.4.5   stable

Each module, or set of PHP files, is installed in /usr/share/pear.

$ find /usr/share/pear -name \*.php  | wc -l
81

To install a module you can use pear install DB and then the find command above will return 98 files. None of this should interrupt your running LAMP server unless you are overwriting PEAR packages that are already in use. Pear also handles dependencies:

$ pear install HTML_QuickForm 
WARNING: channel "pear.php.net" has updated its protocols, 
use "channel-update pear.php.net" to update
downloading HTML_QuickForm-3.2.10.tgz ...
Starting to download HTML_QuickForm-3.2.10.tgz (101,851 bytes)
.......................done: 101,851 bytes
downloading HTML_Common-1.2.4.tgz ...
Starting to download HTML_Common-1.2.4.tgz (4,519 bytes)
...done: 4,519 bytes
install ok: channel://pear.php.net/HTML_Common-1.2.4
install ok: channel://pear.php.net/HTML_QuickForm-3.2.10