Install NGINX, PHP-FPM (5.6) on CentOS 6

First do a yum update (optional):
yum update -y

Once that's done install the latest Webtatic repository which holds our recommended PHP 5.6 and NGINX 1.8 packages:
rpm -Uvh https://mirror.webtatic.com/yum/el6/latest.rpm

rpm -Uvh http://dev.mysql.com/get/mysql57-community-release-el6-9.noarch.rpm

新：

yum install epel-release
rpm -ivh http://rpms.famillecollet.com/enterprise/remi-release-7.rpm

rpm -Uvh https://mirror.webtatic.com/yum/el7/latest.rpm
rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm

rpm -Uvh http://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm

Now install Nginx:
yum install nginx18 -y

Start the service and make it run after boot:
service nginx start
chkconfig nginx on

Now we can install PHP-FPM, we do not need the regular PHP package installed. If you need any modules such as MySQL, just do "yum install php56w-mysql":
yum install php56w-fpm -y

Start the service and run at boot:
service php-fpm start
chkconfig php-fpm on

Now we need to edit a part of the nginx.conf at /etc/nginx/nginx.conf. Look for the following section and change it accordingly to below (bolded text):
        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ .php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index index.php;
        #    fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

Uncomment the location section and edit the fastcgi_param script location from /scripts to our public directory like what is bolded below:
        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        location ~ .php$ {
            root           html;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index index.php;
            f#astcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
            include        fastcgi_params;
        }

Save the nginx.conf file now once those are changed and restart nginx.
service nginx restart

Now lets make a phpinfo page to confirm that PHP is working correctly with Nginx and as an index page. Make a new "index.php" in the /usr/share/nginx/html/ directory with the following contents:
<?php
phpinfo();
?>

Save the file as "index.php" in /usr/share/nginx/html/, delete the index.html in the same directory, then visit the page in your web browser (http://your_server_ip/index.php). You should see the phpinfo() page with all of the information there like the screenshot below.

Create an IPTables firewall rule to allow access to port 80 (web server):
iptables -I INPUT 5 -p tcp -m tcp --dport 80 -j ACCEPT
service iptables save

yum install php56w-mbstring
yum install php56w-gd
yum install php56w-curl
yum install php56w-mysql

It's recommended to disable SELinux as it may cause some permissions issues. Type "setenforce 0" in SSH then edit the "/etc/selinux/config" file and change "enabled" to "disabled".

Done!

卸载php7

yum remove php
yum remove php*
yum remove php-*
yum remove php7
yum remove php70
yum remove php7.0
yum remove php-common