领了台阿里服务器1vCPU 1G，做下测试研究。
系统 centos7，使用yum安装。
Nginx
yum install nginx
##开启nginx
service nginx start
安装php72
安装前确定下系统是否有安装php，有请卸载：
$ yum remove php //不感觉卸载
$ rpm -qa|grep php //显示php包 依次卸载，遇到依赖，先卸载依赖
#如 rpm -e php-mysql-5.1.6-27.el5_5.3
安装：
# yum install epel-release
//更换yum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
yum search php71w
//安装php以及扩展
yum install php71w php71w-fpm php71w-cli php71w-common php71w-devel php71w-gd php71w-pdo php71w-mysql php71w-mbstring php71w-bcmath
//开启服务
service php-fpm start
安装pecl （参考https://www.jianshu.com/p/8490cdfbafb0）
# curl -o go-pear.php http://pear.php.net/go-pear.phar
# php go-pear.php
//查看pecl是否安装成功 (到php目录运行 /etc/bin/)
#pecl -V
Warning: Invalid argument supplied for foreach() in Command.php on line 249
Warning: Invalid argument supplied for foreach() in /usr/share/pear/PEAR/Command.php on line 249
Warning: Invalid argument supplied for foreach() in Command.php on line 249
Warning: Invalid argument supplied for foreach() in /usr/share/pear/PEAR/Command.php on line 249
Warning: Invalid argument supplied for foreach() in Command.php on line 249
Warning: Invalid argument supplied for foreach() in /usr/share/pear/PEAR/Command.php on line 249
Warning: Invalid argument supplied for foreach() in Command.php on line 249
...
//解决办法
#vim /usr/bin/pecl
//找到下面这句
---------------------------------------------------------------------------------------------------------------------------------------------
exec $PHP -C -n -q $INCARG -d date.timezone=UTC -d output_buffering=1 -d variables_order=EGPCS -d safe_mode=0 -d register_argc_argv="On" $INCDIR/peclcmd.php "$@"
---------------------------------------------------------------------------------------------------------------------------------------------
//去掉-n
# pecl -V
PEAR Version: 1.10.5
PHP Version: 7.1.8
Zend Engine Version: 3.1.0
Running on: Linux localhost.localdomain 3.10.0-693.2.2.el7.x86_64 #1 SMP Tue Sep 12
swoole安装
安装gcc
yum install glibc-headers
yum install gcc-c++
安装
pecl install swoole
前往php.ini添加swoole.so ,php -m 显示安装扩展成功！