php5.6 install

Here is a Solution for Centos 7

Install Repos for PHP 5.6.x
rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm

Check PHP list Packages
yum list installed php

Remove all PHP Packages
$ sudo yum remove php php-cli php-common php-gd php-ldap php-mysql php-odbc php-pdo php-pear php-pecl-apc php-pecl-memcache php-pgsql php-soap php-xml php-xmlrpc -y

Restart Apache
$ sudo service httpd restart

Install PHP 5.6.x
sudo yum install php56w php56w-opcache -y

Install PHP 5.6.x Packages
sudo yum install php56w-mcrypt php56w-odbc php56w-pdo php56w-pgsql php56w-soap php56w-xml php56w-gd php56w-mbstring -y

Install MySQL Modules
sudo yum install php56w-mysqlnd

Check PHP Version
$ php –version