在工作中有可能需要多版本的支持，本教程已经安装了lnmp的php5.6版本。再安装php7.1.2
1.安装更新包
yum  install epel-release  //扩展包更新包
yum  update //更新yum源

2.安装mcrypt

yum install -y libmcrypt libmcrypt-devel

3.下载php并安装（下载略）

./configure --prefix=/usr/local/php7 --with-config-file-path=/usr/local/php7/etc --enable-fpm --with-fpm-user=www --with-fpm-group=www --enable-mysqlnd --with-mysqli=mysqlnd --with-pdo-mysql=mysqlnd --with-iconv-dir --with-freetype-dir=/usr/local/freetype --with-jpeg-dir --with-png-dir --with-zlib --with-libxml-dir=/usr --enable-xml --disable-rpath --enable-bcmath --enable-shmop --enable-sysvsem --enable-inline-optimization --with-curl --enable-mbregex --enable-mbstring --enable-intl --enable-pcntl --with-mcrypt --enable-ftp --with-gd --enable-gd-native-ttf --with-openssl --with-mhash --enable-pcntl --enable-sockets --with-xmlrpc --enable-zip --enable-soap --with-gettext --disable-fileinfo --enable-opcache --with-xsl

3.1编译出现错误
/root/php-7.1.2/ext/xmlrpc/libxmlrpc/encodings.c:102: undefined reference to `libiconv_close'
collect2: error: ld returned 1 exit status
make: *** [sapi/cli/php] 错误 1
解决办法
vi Makefile

找到下面这行：

EXTRA_LIBS = -lcrypt ...

在最后添加-liconv


4.配置

cp php.ini-production /usr/local/php7/etc/php.ini
cp sapi/fpm/init.d.php-fpm /etc/init.d/php7-fpm
chmod +x /etc/init.d/php7-fpm
cp /usr/local/php7/etc/php-fpm.conf.default /usr/local/php7/etc/php-fpm.conf
cp /usr/local/php7/etc/php-fpm.d/www.conf.default /usr/local/php7/etc/php-fpm.d/www.conf

5.配置opcache
vim /usr/local/php7/etc/php.ini
zend_extension=/usr/local/php7/lib/php/extensions/no-debug-non-zts-20160303/opcache.so

6.因为之前以及有php5.6已经监听了9000，那么php7就监听9001端口
vi /usr/local/php7/etc/php-fpm.d/php-fpm.conf
listen = 127.0.0.1:9001

7.启动
/etc/init.d/php7-fpm start


8.查看PHP版本
cp /usr/local/php7/bin/php /usr/bin/php7
php7 -v

PHP 7.1.2 (cli) (built: Mar  5 2017 15:43:51) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2017 Zend Technologies
    with Zend OPcache v7.1.2, Copyright (c) 1999-2017, by Zend Technologies