方法一：yum安装

1.添加源

rpm -Uvh https://centos7.iuscommunity.org/ius-release.rpm

2.yum上进行搜索php版本

yum search php7

3.yum安装(选择你要安装的版本)

yum install php70w

方法二：编译式安装

1.下载php版本安装包

wget -O php7.tar.gz http://cn2.php.net/get/php-7.1.1.tar.gz/from/this/mirror

2.解压包

tar -xvf php-7.1.1.tar.gz

3.进入php目录

cd php-7.1.1

4.安装依赖包

yum install libxml2 libxml2-devel openssl openssl-devel bzip2 bzip2-devel libcurl libcurl-devel libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel gmp gmp-devel libmcrypt libmcrypt-devel readline readline-devel libxslt libxslt-devel

5.

编译配置(如果出现错误，基本都是上一步的依赖文件没有安装所致)

./configure \

--prefix=/usr/local/php \

--with-config-file-path=/etc \

--enable-fpm \

--with-fpm-user=nginx \

--with-fpm-group=nginx \

--enable-inline-optimization \

--disable-debug \

--disable-rpath \

--enable-shared \

--enable-soap \

--with-libxml-dir \

--with-xmlrpc \

--with-openssl \

--with-mcrypt \

--with-mhash \

--with-pcre-regex \

--with-sqlite3 \

--with-zlib \

--enable-bcmath \

--with-iconv \

--with-bz2 \

--enable-calendar \

--with-curl \

--with-cdb \

--enable-dom \

--enable-exif \

--enable-fileinfo \

--enable-filter \

--with-pcre-dir \

--enable-ftp \

--with-gd \

--with-openssl-dir \

--with-jpeg-dir \

--with-png-dir \

--with-zlib-dir \

--with-freetype-dir \

--enable-gd-native-ttf \

--enable-gd-jis-conv \

--with-gettext \

--with-gmp \

--with-mhash \

--enable-json \

--enable-mbstring \

--enable-mbregex \

--enable-mbregex-backtrack \

--with-libmbfl \

--with-onig \

--enable-pdo \

--with-mysqli=mysqlnd \

--with-pdo-mysql=mysqlnd \

--with-zlib-dir \

--with-pdo-sqlite \

--with-readline \

--enable-session \

--enable-shmop \

--enable-simplexml \

--enable-sockets \

--enable-sysvmsg \

--enable-sysvsem \

--enable-sysvshm \

--enable-wddx \

--with-libxml-dir \

--with-xsl \

--enable-zip \

--enable-mysqlnd-compression-support \

--with-pear \

--enable-opcache

6.正式安装

make && make install

7.配置环境变量

vi /etc/profile

在尾部添加

PATH=$PATH:/usr/local/php/bin

export PATH

执行命令使得改动立即生效

source /etc/profile

8.配置php-fpm

cp php.ini-production /etc/php.ini

cp /usr/local/php/etc/php-fpm.conf.default /usr/local/php/etc/php-fpm.conf

cp /usr/local/php/etc/php-fpm.d/www.conf.default /usr/local/php/etc/php-fpm.d/www.conf

cp sapi/fpm/init.d.php-fpm /etc/init.d/php-fpm

chmod +x /etc/init.d/php-fpm

9.启动php-fpm

/etc/init.d/php-fpm start

如果启动出现以下报错问题

Starting php-fpm [26-Nov-2017 12:14:22] ERROR: [pool www] cannot get uid for user 'nginx' [26-Nov-2017 12:14:22] ERROR: FPM initialization failed  failed

添加用户nginx跟对应用户组即可

groupadd nginx

useradd nginx -g nginx -s /sbin/nologin -M