PHP 5.6 + Magento 1.9 on CentOS 7

Install PHP 5.6:

sudo yum -y update
sudo yum -y install epel-release
wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
wget https://centos7.iuscommunity.org/ius-release.rpm
sudo rpm -Uvh ius-release*.rpm
sudo yum -y update
sudo yum -y install php56u php56u-opcache php56u-xml php56u-mcrypt php56u-gd php56u-devel php56u-mysql php56u-intl php56u-mbstring php56u-bcmath
sudo service httpd restart

sudo yum install httpd
sudo systemctl start httpd.service
sudo systemctl enable httpd.service
sudo vim /etc/httpd/conf/httpd.conf

sudo yum install mariadb-server mariadb
sudo systemctl start mariadb.service
sudo systemctl enable mariadb.service

sudo mysql_secure_installation