To downgrade PHP version you need to stop you webserver
stop Apache service httpd stop
then
yum install php56
then
yum --enablerepo=remi-php56 install php56-php php56-php-pear php56-php-bcmath php56-php-pecl-jsond-devel php56-php-mysqlnd php56-php-gd php56-php-common php56-php-fpm php56-php-intl php56-php-cli php56-php php56-php-xml php-php-opcache php56-php-pecl-apcu php56-php-pecl-jsond php56-php-pdo php56-php-gmp php56-php-process php56-php-pecl-imagick php56-php-devel php56-php-mbstring
then
service php70-php-fpm stop
then
rm /usr/bin/php
press y
then
ln -s /usr/bin/php56 /usr/bin/php
then
service httpd restart
and it's done
check PHP version by running
php -v
That's it if your hosting not providing support or solution contact us by https://royalclouds.net/support