Hi,

On a Centos 5.3 box, I wanted to upgrade from php 5.1 to php 5.2
I ran into the same depsolving issues I saw here on the forum,
but I found a solution.

first of all, add this line to /etc/yum.repos.d/remi.repo:

exclude=php*5.3.0*

================================================
[remi]
name=Les RPM de remi pour Enterprise Linux 5 - $basearch
baseurl=http://rpms.famillecollet.com/enterprise/5/remi/$basearch/
    http://iut-info.univ-reims.fr/remirpms/ … $basearch/
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi
failovermethod=priority
exclude=php*5.3.0*

[remi-test]
name=Les RPM de remi en test pour Enterprise Linux 5 - $basearch
baseurl=http://rpms.famillecollet.com//enterprise/5/test/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi
================================================

I ran the following command to start the upgrade process:

yum --enablerepo=remi update php-* mysql*

but got following errors:

php-pecl-memcache-3.0.4-2.el5.remi.1.i386 from remi has depsolving problems
  --> Missing Dependency: php(api) = 20090626 is needed by package php-pecl-memcache-3.0.4-2.el5.remi.1.i386 (remi)
php-pecl-memcache-3.0.4-2.el5.remi.1.i386 from remi has depsolving problems
  --> Missing Dependency: php(zend-abi) = 20090626 is needed by package php-pecl-memcache-3.0.4-2.el5.remi.1.i386 (remi)
Error: Missing Dependency: php(zend-abi) = 20090626 is needed by package php-pecl-memcache-3.0.4-2.el5.remi.1.i386 (remi)
Error: Missing Dependency: php(api) = 20090626 is needed by package php-pecl-memcache-3.0.4-2.el5.remi.1.i386 (remi)

So I uninstalled the php-pecl-memcache rpm and ran the update command again.
Everything worked fine afterwards.

I had a similar problem a couple of months ago on a Centos 5.2 box.
But there the problem was that I had the php-readline rpm installed
and that rpm was not available in the remi repo.
Uninstalling php-readline allowed me to upgrade.

I guess you'll probably run into problems when you need those specific rpms on your server,
but this is what worked for me.

after an upgrade it's always good to run 'php -v'
if no errors pop up, you're good.

hope this helps.
gr, Paul