How to install PHP 7 via apt-get ?
/etc/apt/sources.list
deb http://packages.dotdeb.org jessie all
deb-src http://packages.dotdeb.org jessie all
command line
wget https://www.dotdeb.org/dotdeb.gpg
apt-key add dotdeb.gpg
apt-get install php7
install
# apt-get install php7
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package php7