My work laptop is running Ubuntu 12.10 (32-bit). Due to the need to be able to test our code in the same versions of PHP, Memcache, and a few other modules; I need to keep the PHP version right where they are at (for example PHP 5.3.x). However I would like to upgrade to my current OS version to Ubuntu 13.04.

Can I upgrade without worrying that Ubuntu will also upgrade the PHP package and other related packages? Or will it just do that whether I like it or not?

Thanks!

Edit:
After running "sudo apt-get dist-upgrade -V" I get the following results:

The following packages will be REMOVED:

   libmemcached6 (0.44-1.1build1)

   php5-intl (5.4.6-1ubuntu1.4)

   php5-memcached (2.0.1-6)

   php5-xsl (5.4.6-1ubuntu1.4)

The following NEW packages will be installed:

   libjs-underscore (1.3.3-1ubuntu1)

   libmemcached10 (1.0.8-1)

   libmemcachedutil2 (1.0.8-1)

   linux-headers-3.5.0-40 (3.5.0-40.62)

   linux-headers-3.5.0-40-generic (3.5.0-40.62)

   linux-image-3.5.0-40-generic (3.5.0-40.62)

   linux-image-extra-3.5.0-40-generic (3.5.0-40.62)

The following packages have been kept back:

   php-apc (3.1.7-1 => 3.1.13-1)

The following packages will be upgraded:

   libmemcached-tools (0.44-1.1build1 => 1.0.8-1)

   linux-headers-generic (3.5.0.31.47 => 3.5.0.40.56)

   linux-image-generic (3.5.0.31.47 => 3.5.0.40.56)

   mercurial (2.6.1-1ppa1~quantal1 => 2.7-0ppa1~quantal1)

   mercurial-common (2.6.1-1ppa1~quantal1 => 2.7-0ppa1~quantal1)

   tortoisehg (2.8-0ppa1~quantal1 => 2.9-0ppa1~quantal1)

The following packages will be DOWNGRADED:

   libapache2-mod-php5 (5.3.10-1ubuntu3.6 => 5.3.10-1ubuntu3)

   php5-cli (5.3.10-1ubuntu3.6 => 5.3.10-1ubuntu3)

   php5-common (5.3.10-1ubuntu3.6 => 5.3.10-1ubuntu3)

   php5-curl (5.3.10-1ubuntu3.6 => 5.3.10-1ubuntu3)

   php5-gd (5.3.10-1ubuntu3.6 => 5.3.10-1ubuntu3)

   php5-mysql (5.3.10-1ubuntu3.6 => 5.3.10-1ubuntu3)

   php5-sqlite (5.3.10-1ubuntu3.6 => 5.3.10-1ubuntu3)

   php5-sybase (5.3.10-1ubuntu3.6 => 5.3.10-1ubuntu3)

So it looks like I would be fine.