Install PHP7 on OrangePiPC 3.4.113-sun8i

Hi,

I cannot find how to install PHP7 on my OrangePiPC 3.4.113-sun8i

I installed apache and mariadb by

"apt-get install apache2 mariadb-server mariadb-client mariadb.common"

but how do I install PHP7?

thanX advance, Antonios