1.下载php最新源代码

从github下载源码：

wget -c --no-check-certificate -O php7-src-master.zip https://github.com/php/php-src/archive/master.zip

解压

unzip -q php7-src-master.zip && cd php-src-master

安装必要库

yum -y install libxml2 libxml2-devel openssl openssl-devel curl-devel libjpeg-devel libpng-devel freetype-devel libmcrypt-devel

2.编译php

配置

./buildconf
./configure --prefix=/usr/local/php7 --exec-prefix=/usr/local/php7 --bindir=/usr/local/php7/bin --sbindir=/usr/local/php7/sbin --includedir=/usr/local/php7/include --libdir=/usr/local/php7/lib/php --mandir=/usr/local/php7/php/man --with-config-file-path=/usr/local/php7/etc --with-mysql-sock=/var/lib/mysql/mysql.sock --with-mcrypt=/usr/include --with-mhash--with-openssl --with-mysqli=shared,mysqlnd --with-pdo-mysql=shared,mysqlnd --with-gd --with-iconv --with-zlib --enable-zip --enable-inline-optimization --disable-debug --disable-rpath --enable-shared --enable-xml --enable-bcmath --enable-shmop --enable-sysvsem --enable-mbregex --enable-mbstring --enable-ftp --enable-gd-native-ttf --enable-pcntl --enable-sockets --with-xmlrpc --enable-soap --without-pear --with-gettext --enable-session --with-curl --with-openssl --with-jpeg-dir --with-freetype-dir --enable-opcache --enable-fpm --with-fpm-user=nginx --with-fpm-group=nginx --without-gdbm --enable-fileinfo

3.编译安装(时间比较长，耐心等待一会儿)

make clean && make && make install

5.设置php7的配置文件

php.ini、php-fpm.conf、www.conf和php-fpm脚本

推荐使用整理的3个PHP7配置文件和php-fpm服务控制脚本，也可以使用编译后的配置文件复制到PHP7的配置目录（/usr/local/php7/etc/）

6.添加php的环境变量

将php编译生成的bin目录添加到当前Linux系统的环境变量中

echo -e '\nexport PATH=/usr/local/php7/bin:/usr/local/php7/sbin:$PATH\n' >> /etc/profile && source /etc/profile

7.设置PHP日志目录和php-fpm进程文件（php-fpm.sock）目录

mkdir -p /var/log/php-fpm/ && mkdir -p /var/run/php-fpm && cd /var/run/ && chown -R nginx:nginx php-fpm

创建php会话session目录

mkdir -p /var/lib/php/session
chown -R nginx:nginx /var/lib/php