Php – Debian server is showing PHP code instead of interpreting it

I was told on stackoverflow to post this question here:

Scroll down to see result of things I've done based on suggestions

I am setting up my first project using Vagrant. I chose the following package puppetlabs/debian-7.8-64-puppet for the debian server, because it's the same we are using for our remote development server. Unfortunetely this debian distro only contains the PHP version 5.4, so I tried to install dotdeb so I can use PHP 5.6.11.

I added

deb http://packages.dotdeb.org wheezy all
deb-src http://packages.dotdeb.org wheezy all
deb http://packages.dotdeb.org wheezy-php56 all
deb-src http://packages.dotdeb.org wheezy-php56 all

as mentioned here https://www.dotdeb.org/instructions/ to my /etc/apt/sources.list and then ran the following commands

wget http://www.dotdeb.org/dotdeb.gpg
sudo apt-key add dotdeb.gpg

## get package list from sources incl. new set source dotdeb
sudo apt-get update

## Install php, APC, gd and cURL
sudo apt-get install -y php5 php5-apcu php5-gd php5-curl

Now, when using php --version it tells me that I'm using version 5.6.11, so it seems to have worked to install it. But the problem I'm having is, that the webserver doesn't seem to interpret it because it displays the real php code. What am I doing wrong?

Here is my Vagrantfile without the commentes

config.vm.box = "puppetlabs/debian-7.8-64-puppet"
config.vm.provision :shell, path: "vagrant_ressources/bootstrap.sh"
config.vm.network "forwarded_port", guest: 80, host: 8080
config.vm.synced_folder ".", "/var/www"

And this is my bootstrap.sh

#!/usr/bin/env bash

# Use single quotes instead of double quotes to make it work with special-character passwords
PASSWORD='12345678'

# Update package manager
apt-get update
# Install apache2
sudo apt-get install -y apache2

# Add dotdeb to packages
if [ ! -f /var/log/dotdebconfig ];
then
echo "" | sudo tee --append /etc/apt/sources.list
echo "#dotdeb" | sudo tee --append /etc/apt/sources.list
echo "deb http://packages.dotdeb.org wheezy all" | sudo tee --append /etc/apt/sources.list
echo "deb-src http://packages.dotdeb.org wheezy all" | sudo tee --append /etc/apt/sources.list
echo "deb http://packages.dotdeb.org wheezy-php56 all" | sudo tee --append /etc/apt/sources.list
echo "deb-src http://packages.dotdeb.org wheezy-php56 all" | sudo tee --append /etc/apt/sources.list
wget http://www.dotdeb.org/dotdeb.gpg
sudo apt-key add dotdeb.gpg

## get package list from sources incl. new set source dotdeb
sudo apt-get update

## Install php, APC, gd and cURL
sudo apt-get install -y php5 php5-apcu php5-gd php5-curl

touch /var/log/dotdebconfig

fi

#install mysql and give password to installer
if [ ! -f /var/log/mysqlconfig ];
then
# Set passwords
sudo debconf-set-selections <<< "mysql-server mysql-server/root_password password $PASSWORD"
sudo debconf-set-selections <<< "mysql-server mysql-server/root_password_again password $PASSWORD"
# Install MySQL Server and cURL
sudo apt-get -y install mysql-server
sudo apt-get -y install php5-mysql

touch /var/log/mysqlconfig

fi

if [ ! -f /var/log/XXXXXX ];
then
    mkdir -p /var/www/htdocs
    # Install XXXXXX vhost
    sudo a2dissite default
    sudo a2enmod rewrite
    cd /etc/apache2/sites-available
    # copy default vhost conf to sites-available
    sudo cp /var/www/vagrant_ressources/XXXXXX.vhost.conf XXXXXX.dev
    sudo a2ensite XXXXXX.dev
    touch /var/log/XXXXXX
fi

sudo /etc/init.d/apache2 restart

And this is my XXXXXX.vhost.conf (don't know if its needed)

<VirtualHost *:80>
        ServerAdmin webmaster@localhost

        DocumentRoot /var/www/htdocs
        <Directory />
                Options FollowSymLinks
                AllowOverride All
        </Directory>
        <Directory /var/www/htdocs/>
                Options Indexes FollowSymLinks MultiViews
                AllowOverride All
                Order allow,deny
                allow from all
        </Directory>

        ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
        <Directory "/usr/lib/cgi-bin">
                AllowOverride All
                Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
                Order allow,deny
                Allow from all
        </Directory>

        ErrorLog ${APACHE_LOG_DIR}/error.log

        # Possible values include: debug, info, notice, warn, error, crit,
        # alert, emerg.
        LogLevel warn

        CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

Suggestions

Someone told me: "Try installing libapache2-mod-php5"
However, it seems like it's already on my server, because I'm getting the following error message: libapache2-mod-php5 is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 8 not upgraded.