PHP 7.0.0 is now also available for Ubuntu
PPA with PHP 7.0. If you want a co-installable version of PHP, please use:PHP 7.0.0 for Ubuntu
ppa:ondrej/php
where PHP 7.0 and PHP 5.6 co-exists.
You can get more information about the packages at https://deb.sury.org
For PHP 5.6 use: ppa:ondrej/php5-5.6
For PHP 5.5 use: ppa:ondrej/php5
For PHP 5.4 use: ppa:ondrej/php5-oldstable
BUGS&FEATURES: This PPA now has a issue tracker: https://deb.sury.org/pages/bugreporting.html