How to Install MySQL on CentOS 7 version 5.6

Ref links only 

https://www.linode.com/docs/databases/mysql/how-to-install-mysql-on-centos-7/

https://www.tecmint.com/install-php-5-6-on-centos-7/

yum  install php-mysqlnd php-pgsql php-fpm php-pecl-mongo php-pdo php-pecl-memcache php-pecl-memcached php-gd php-xml php-mbstring php-mcrypt php-pecl-apcu php-cli php-pear