I run Apache 2 with WSGI (for a Django-app) on a Ubuntu box. I want to use Nagios for server monitoring, and for this purpose it seems I have to add PHP support to Apache.

When I installed Apache 2, I did this:

apt-get install apache2 apache2.2-common apache2-mpm-worker apache2-threaded-dev libapache2-mod-wsgi python-dev

Available modules for apache2 are these:

/etc/apache2/mods-available$ ls

actions.conf      authn_default.load    cache.load           deflate.conf        filter.load
mime.conf         proxy_ftp.load        suexec.load          actions.load        authn_file.load
cern_meta.load    deflate.load          headers.load         mime.load           proxy_http.load
unique_id.load    alias.conf            authnz_ldap.load     cgi.load            dir.conf
ident.load        mime_magic.conf       rewrite.load         userdir.conf        alias.load
authz_dbm.load    cgid.conf             dir.load             imagemap.load       mime_magic.load
setenvif.conf     userdir.load          asis.load            authz_default.load  cgid.load
disk_cache.conf   include.load          negotiation.conf     setenvif.load       usertrack.load
auth_basic.load   authz_groupfile.load  charset_lite.load    disk_cache.load     info.conf
negotiation.load  speling.load          version.load         auth_digest.load    authz_host.load
dav.load          dump_io.load          info.load            proxy.conf          ssl.conf
vhost_alias.load  authn_alias.load      authz_owner.load     dav_fs.conf         env.load
ldap.load         proxy.load            ssl.load             wsgi.conf           authn_anon.load
authz_user.load   dav_fs.load           expires.load         log_forensic.load   proxy_ajp.load
status.conf       wsgi.load             authn_dbd.load       autoindex.conf      dav_lock.load
ext_filter.load   mem_cache.conf        proxy_balancer.load  status.load         authn_dbm.load
autoindex.load    dbd.load              file_cache.load      mem_cache.load      proxy_connect.load
substitute.load

What is the best way for me to add PHP support to Apache 2 without breaking my current installation and configuration?