sudo service apache2 restart
apache2: Syntax error on line 244 of /etc/apache2/apache2.conf: Syntax error on line 1 of /etc/apache2/mods-enabled/php5.load:
Cannot load /usr/lib/apache2/modules/libphp5.so into server: /usr/lib/apache2/modules/libphp5.so: cannot open shared object file: No such file or directory
Action 'configtest' failed.
The Apache error log may have more information.
 failed!

sudo apt-get install libapache2-mod-php5
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 libapache2-mod-php5 : Depends: apache2-api-20120211
                       Depends: apache2 (>= 2.4)
 udev : Depends: libudev1 (= 215-5+b1) but 215-6 is to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

insserv: script apache: service apache2 already provided!
Errors were encountered while processing:
 /var/cache/apt/archives/udev_215-6_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)