显示的是在现有的安装源中能够安装的最新版本

yum provides php

在安装PHP7之前，建议先升级更新一下CentOS7的安装包

yum -y upgrade

完成后，重启httpd

systemctl restart httpd.service

移除CentOS7 已安装的php-common

yum remove php-common -y

安装php源

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

查看目前能够安装的PHP版本

yum list php*

安装php

yum -y install php72w
yum install php72w-common php72w-fpm php72w-opcache php72w-gd php72w-mysqlnd php72w-mbstring php72w-pecl-redis php72w-pecl-memcached php72w-devel

以下为常用扩展

php72w			                           mod_php	, php72w-zts
php72w-bcmath		
php72w-cli		                           php-cgi, php-pcntl, php-readline
php72w-dba		
php72w-devel		
php72w-embedded		                   php-embedded-devel
php72w-enchant		
php72w-fpm		
php72w-gd		
php72w-imap		
php72w-interbase		                     php_database, php-firebird
php72w-intl		
php72w-ldap		
php72w-mbstring		
php72w-mcrypt		
php72w-mysql		                         php-mysqli, php_database
php72w-mysqlnd		                     php-mysqli, php_database
php72w-odbc		                         php-pdo_odbc, php_database
php72w-opcache		                     php72w-pecl-zendopcache
php72w-pdo		                        php72w-pdo_sqlite, php72w-sqlite3
php72w-pdo_dblib		                     php72w-mssql
php72w-pear		
php72w-pecl-apcu	
php72w-pecl-imagick	
php72w-pecl-memcached	
php72w-pecl-mongodb	
php72w-pecl-redis	
php72w-pecl-xdebug	
php72w-pgsql		                      php-pdo_pgsql, php_database
php72w-phpdbg		
php72w-process		        php-posix, php-sysvmsg, php-sysvsem, php-sysvshm
php72w-pspell		
php72w-recode		
php72w-snmp		
php72w-soap		
php72w-tidy		
php72w-xml		                    php-dom, php-domxml, php-wddx, php-xsl
php72w-xmlrpc	

上面所有模块
yum -y install php72w php72w-bcmath php72w-cli php72w-dba php72w-devel php72w-embedded php72w-enchant php72w-fpm php72w-gd php72w-imap php72w-interbase php72w-intl php72w-ldap php72w-mbstring php72w-mcrypt php72w-mysql php72w-mysqlnd php72w-odbc php72w-opcache php72w-pdo php72w-pdo_dblib php72w-pear php72w-pecl-apcu php72w-pecl-imagick php72w-pecl-memcached php72w-pecl-mongodb php72w-pecl-redis php72w-pecl-xdebug php72w-pgsql php72w-phpdbg php72w-process php72w-pspell php72w-recode php72w-snmp php72w-soap php72w-tidy php72w-xml php72w-xmlrpc

验证php是否安装成功

php -v

验证对应的扩展是否安装成功

php -m

设置php-fpm并检测php-fpm的运行状态
启动php-fpm

service php-fpm start

检查启动是否成功

service php-fpm status

设置开机自启动

systemctl enable php-fpm.service

检查开机自启动是否设置成功

systemctl list-dependencies | grep php-fpm
ps -ef | grep php-fpm

记得重启Apache