方法一、简单安装（通过yum）
1.安装epel-release rpm -ivh http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm 2.安装PHP7的rpm源 rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm 3.安装PHP7 yum install php70w
方法二、编译安装
1.下载php7 wget -O php7.tar.gz http://cn2.php.net/get/php-7.1.1.tar.gz/from/this/mirror 2.解压php7 tar -xvf php7.tar.gz 3.进入php目录 cd php-7.0.4 4.安装依赖包 # 直接复制下面一行（不包括本行） 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）
嫌麻烦的可以从这一步起参考PHP官方安装说明：http://php.net/manual/zh/install.unix.nginx.php
./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=no
编译时遇到错误： PHP configure: error: mcrypt.h not found. Please reinstall libmcrypt. 解决参考：https://blog.csdn.net/tanga842428/article/details/76861462
编译时遇到错误：configure: error: off_t undefined; check your library configuration 解决办法 解决参考：http://www.21yunwei.com/archives/5575
6.正式安装 make && make install
7.配置环境变量 vi /etc/profile 在末尾追加 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
转载自：http://www.jb51.net/article/109228.htm
内容增加：报错后解决链接
