CENTOS的策略实在是太保守了，现在PHP的官方包才5.3 PHP7性能大幅提高，不尝试下对不起自己。
1、最小化安装CENTOS7
2、更新源：
yum update
reboot
3.安装扩展源：
yum install epel-release
4.安装工具软件：
yum install wget unzip unrar
5.安装PHP7.0扩展源：
wget http://rpms.famillecollet.com/enterprise/remi-release-7.rpm
rpm -Uvh remi-release-7*.rpm
6.安装NGINX扩展源：
rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
yum install nginx
7.安装PHP7.0
yum --enablerepo=remi,remi-test install php70-php-fpm
yum --enablerepo=remi,remi-test install php70-php-pgsql php70-php-iconv php70-php-mbstring
8.安装POSTGRESQL9.5
rpm -i http://yum.postgresql.org/9.5/redhat/rhel-7-x86_64/pgdg-centos95-9.5-1.noarch.rpm
yum install -y postgresql95-server.x86_64
systemctl enable postgresql-9.5.service
/usr/pgsql-9.5/bin/postgresql95-setup initdb
systemctl start postgresql-9.5.service
9. 编辑NGINX配置文件：
vi /etc/nginx/conf.d/default.conf
location / {
root /usr/share/nginx/html;
index index.php index.html index.htm;
}
location ~ \.php$ {
# root html;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME /usr/share/nginx/html$fastcgi_script_name;
include fastcgi_params;
}
10.编辑PHP-FPM 配置文件，将用户修改，可以解决WORDPRESS等在线更新等很多奇怪的问题：
vi /etc/opt/remi/php70/php-fpm.d/www.conf
user=nginx
11.启动服务：
systemctl start nginx
systemctl start php70-php-fpm
systemctl enable nginx
systemctl enable php70-php-fpm
更多内容，blog.dazhuang.cc 。如果存在问题，检查一下防火墙的设置。