Can't install apache2 again

I have previously had apache2 installed, I upgraded to php5.5 and this broke my install so i tried to fix a few files. But that didnt work, I autoremoved apache but I still get this error when I try to install:

/etc/init.d/apache2: 64: .: Can't open /etc/apache2/envvars
/etc/init.d/apache2: 76: .: Can't open /etc/apache2/envvars
ERROR: APACHE_PID_FILE needs to be defined in /etc/apache2/envvars
invoke-rc.d: initscript apache2, action "restart" failed.

When you remove and re-install Apache it does not remove or over write config files.

see How can I restore configuration files?

Try:

sudo apt-get purge apache2
sudo apt-get install apache2

If that fails, update your question with error messages

Use command lines below:

sudo apt-get remove apache2
sudo apt-get purge apache2
sudo apt-get autoremove

And finally, install apache2 again: sudo apt-get -y install apache2.

Try:

sudo apt-get -o Dpkg::Options::="--force-confmiss" install --reinstall apache2.2-common

It will reinstall apache packages and restore all configuration files in /etc/apache2.