环境：CentOS 7.4.1708
一、检查当前系统是否已经安装PHP
[root@localhost ~]# rpm -qa php二、查看yum是否有可安装的PHP软件
[root@localhost ~]# yum list | grep php
emacs-php-mode.noarch 1.18.2-1.el7 base
graphviz-php.x86_64 2.30.1-21.el7 base
php.x86_64 5.4.16-45.el7 base
php-bcmath.x86_64 5.4.16-45.el7 base
php-cli.x86_64 5.4.16-45.el7 base
php-common.x86_64 5.4.16-45.el7 base
php-dba.x86_64 5.4.16-45.el7 base
php-devel.x86_64 5.4.16-45.el7 base
php-embedded.x86_64 5.4.16-45.el7 base
php-enchant.x86_64 5.4.16-45.el7 base
php-fpm.x86_64 5.4.16-45.el7 base
php-gd.x86_64 5.4.16-45.el7 base
php-intl.x86_64 5.4.16-45.el7 base
php-ldap.x86_64 5.4.16-45.el7 base
php-mbstring.x86_64 5.4.16-45.el7 base
php-mysql.x86_64 5.4.16-45.el7 base
php-mysqlnd.x86_64 5.4.16-45.el7 base
php-odbc.x86_64 5.4.16-45.el7 base
php-pdo.x86_64 5.4.16-45.el7 base
php-pear.noarch 1:1.9.4-21.el7 base
php-pecl-memcache.x86_64 3.0.8-4.el7 base
php-pgsql.x86_64 5.4.16-45.el7 base
php-process.x86_64 5.4.16-45.el7 base
php-pspell.x86_64 5.4.16-45.el7 base
php-recode.x86_64 5.4.16-45.el7 base
php-snmp.x86_64 5.4.16-45.el7 base
php-soap.x86_64 5.4.16-45.el7 base
php-xml.x86_64 5.4.16-45.el7 base
php-xmlrpc.x86_64 5.4.16-45.el7 base
rrdtool-php.x86_64 1.4.8-9.el7 base
uuid-php.x86_64 1.6.2-26.el7 base三、安装PHP
[root@localhost ~]# yum -y install php四、查看版本及支持的扩展
[root@localhost ~]# php -v
PHP 5.4.16 (cli) (built: Apr 12 2018 19:02:01)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies[root@localhost ~]# php -m
[PHP Modules]
bz2
calendar
Core
ctype
curl
date
ereg
exif
fileinfo
filter
ftp
gettext
gmp
hash
iconv
json
libxml
mhash
openssl
pcntl
pcre
Phar
readline
Reflection
session
shmop
SimpleXML
sockets
SPL
standard
tokenizer
xml
zip
zlib
[Zend Modules][root@localhost ~]# ll /etc/php.d/
total 20
-rw-r--r-- 1 root root 49 Apr 12 15:04 curl.ini
-rw-r--r-- 1 root root 57 Apr 12 15:04 fileinfo.ini
-rw-r--r-- 1 root root 49 Apr 12 15:04 json.ini
-rw-r--r-- 1 root root 49 Apr 12 15:04 phar.ini
-rw-r--r-- 1 root root 47 Apr 12 15:04 zip.ini
[root@localhost ~]# ll /usr/lib64/php/modules/
total 3100
-rwxr-xr-x 1 root root 74776 Apr 12 15:04 curl.so
-rwxr-xr-x 1 root root 2713464 Apr 12 15:04 fileinfo.so
-rwxr-xr-x 1 root root 44784 Apr 12 15:04 json.so
-rwxr-xr-x 1 root root 272112 Apr 12 15:04 phar.so
-rwxr-xr-x 1 root root 58496 Apr 12 15:04 zip.so五、安装php-mysqlnd
当前系统已安装的mysql版本是：
[root@localhost ~]# rpm -qi mysql-community-server
Name : mysql-community-server
Version : 8.0.11
Release : 1.el7
Architecture: x86_64
Install Date: Thu 17 May 2018 09:40:08 PM EDT
Group : Applications/Databases
Size : 1633523890
License : Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved. Under GPLv2 license as shown in the Description field.
Signature : DSA/SHA1, Sun 08 Apr 2018 01:07:21 PM EDT, Key ID 8c718d3b5072e1f5
Source RPM : mysql-community-8.0.11-1.el7.src.rpm
Build Date : Sun 08 Apr 2018 03:29:08 AM EDT
Build Host : siv27.no.oracle.com
Relocations : (not relocatable)
Packager : MySQL Release Engineering <mysql-build@oss.oracle.com>
Vendor : Oracle and/or its affiliates
URL : http://www.mysql.com/
Summary : A very fast and reliable SQL database server
Description :
The MySQL(TM) software delivers a very fast, multi-threaded, multi-user,
and robust SQL (Structured Query Language) database server. MySQL Server
is intended for mission-critical, heavy-load production systems as well
as for embedding into mass-deployed software. MySQL is a trademark of
Oracle and/or its affiliates
The MySQL software has Dual Licensing, which means you can use the MySQL
software free of charge under the GNU General Public License
(http://www.gnu.org/licenses/). You can also purchase commercial MySQL
licenses from Oracle and/or its affiliates if you do not wish to be bound by the terms of
the GPL. See the chapter "Licensing and Support" in the manual for
further info.
The MySQL web site (http://www.mysql.com/) provides the latest news and
information about the MySQL software. Also please see the documentation
and the manual for more information.
This package includes the MySQL server binary as well as related utilities
to run and administer a MySQL server.安装php-mysqld插件
[root@localhost ~]# yum -y install php-mysqlnd[root@localhost ~]# ll /etc/php.d/
total 48
-rw-r--r-- 1 root root 49 Apr 12 15:04 curl.ini
-rw-r--r-- 1 root root 57 Apr 12 15:04 fileinfo.ini
-rw-r--r-- 1 root root 49 Apr 12 15:04 json.ini
-rw-r--r-- 1 root root 55 Apr 12 15:04 mysqlnd.ini
-rw-r--r-- 1 root root 69 Apr 12 15:04 mysqlnd_mysqli.ini
-rw-r--r-- 1 root root 67 Apr 12 15:04 mysqlnd_mysql.ini
-rw-r--r-- 1 root root 47 Apr 12 15:04 pdo.ini
-rw-r--r-- 1 root root 63 Apr 12 15:04 pdo_mysqlnd.ini
-rw-r--r-- 1 root root 61 Apr 12 15:04 pdo_sqlite.ini
-rw-r--r-- 1 root root 49 Apr 12 15:04 phar.ini
-rw-r--r-- 1 root root 55 Apr 12 15:04 sqlite3.ini
-rw-r--r-- 1 root root 47 Apr 12 15:04 zip.ini
[root@localhost ~]# ll /usr/lib64/php/modules/
total 3772
-rwxr-xr-x 1 root root 74776 Apr 12 15:04 curl.so
-rwxr-xr-x 1 root root 2713464 Apr 12 15:04 fileinfo.so
-rwxr-xr-x 1 root root 44784 Apr 12 15:04 json.so
-rwxr-xr-x 1 root root 133224 Apr 12 15:04 mysqlnd_mysqli.so
-rwxr-xr-x 1 root root 53624 Apr 12 15:04 mysqlnd_mysql.so
-rwxr-xr-x 1 root root 256632 Apr 12 15:04 mysqlnd.so
-rwxr-xr-x 1 root root 28880 Apr 12 15:04 pdo_mysqlnd.so
-rwxr-xr-x 1 root root 116408 Apr 12 15:04 pdo.so
-rwxr-xr-x 1 root root 29240 Apr 12 15:04 pdo_sqlite.so
-rwxr-xr-x 1 root root 272112 Apr 12 15:04 phar.so
-rwxr-xr-x 1 root root 51472 Apr 12 15:04 sqlite3.so
-rwxr-xr-x 1 root root 58496 Apr 12 15:04 zip.so要让PHP以FastCGI的方式与nginx进行交互，需要有PHP-FPM模块的支持。
安装PHP-FPM
[root@localhost ~]# yum -y install php-fpm[root@localhost ~]# php-fpm -v
PHP 5.4.16 (fpm-fcgi) (built: Apr 12 2018 19:03:25)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies启动PHP-FPM
[root@localhost ~]# systemctl start php-fpm以上安装完成后，接下来，配置Nginx支持PHP（FastCGI方式）。
修改 /usr/local/nginx/conf/nginx.conf 把如下图红色框中的#去掉就可以了。
这里面都是默认的，root是配置php程序放置的根目录。
还需要修改的就是fastcgi_param中的/scripts为$document_root
修改完成后，让nginx重新加载配置以生效：
[root@localhost ~]# /usr/local/nginx/sbin/nginx -s reload测试
[root@localhost ~]# cd /usr/local/nginx/html/
[root@localhost html]# touch index.php
[root@localhost html]# vim index.php
[root@localhost html]# cat index.php
<?php
phpinfo();
?>
