i am kind of new to linux/a2billing and have the same problem.
rpm -q php show php-4.3.11-2.8
i did try to install with 'rpm -iv /tmp/php-pcntl-4.3.11-2.5.1.i386.rpm'. then query it with 'rpm -q php-pcntl-4.3.11-2.5.1.i386.rpm'. system tell me it is not install. but when i redo rpm -iv, it show its already installed.
php -m | grep pnctl show....
PHP Warning: Unknown(): Unable to load dynamic library '/usr/lib/php4/imap.so' - libc-client.so.0: cannot open shared object file: No such file or directory in Unknown on line 0
anyone can help!!