POSTIN

/bin/sh

pear install --nodeps --soft --force --register-only /var/lib/pear/PEAR_RemoteInstaller.xml

POSTUN

/bin/sh

if [ "$1" -eq "0" ]; then
    pear uninstall --nodeps --ignore-errors --register-only pear.php.net/PEAR_RemoteInstaller
fi