apt-get install software-properties-common
add-apt-repository ppa:ondrej/php
apt-get update
apt install -y php5.6 php5.6-common php5.6-mysql php5.6-xml php5.6-xmlrpc
php5.6-curl php5.6-gd php5.6-imagick php5.6-cli php5.6-dev php5.6-imap
php5.6-mbstring php5.6-opcache php5.6-soap php5.6-zip php5.6-intl php5.6-mcrypt