在经历了编译安装的痛苦之后，还是决定使用yum安装了

【可选】查询是否安装了软件，目的是卸载编译安装的php

rpm -qa | grep -i 软件名

rpm -qa | grep php

rm -rf /usr/local/php

修改yum下载源为阿里云的地址

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

添加阿里云的epel镜像源

wget -O /etc/yum.repos.d/epel-7.repo http://mirrors.aliyun.com/repo/epel-7.repo

yum clean all

yum clean plugins

yum makecache

安装remi扩展源

yum install epel-release

yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm

安装yum管理工具

yum install yum-utils

查找是否有php74

yum search php74

安装php

yum install php74-php-cli php74-php-common php74-php-devel php74-php-embedded php74-php-fpm php74-php-gd php74-php-mbstring php74-php-mysqlnd php74-php-pdo php74-php-opcache php74-php-xml php74-php-soap php74-php-bcmath php74-php-json php74-php-gmp php74-php-pecl-redis4 php74-php-pecl-mcrypt php74-php-process php74-php-pecl-zip php74-php-pecl-crypto php74-php-pecl-memcache php74-php-pecl-memcached

确认安装结果

yum list installed | grep php

建立软连接

通过remi安装的php的指令是php74，这里请根据实际情况建立一下软链接

ln -s /opt/remi/php74/root/usr/bin/php /usr/local/php/bin/php

ln -s /opt/remi/php74/root/usr/bin/php /usr/local/bin/php

查看php版本

php -v

启动fpm

service php74-php-fpm start

systemctl start php74-php-fpm

systemctl status php74-php-fpm

systemctl stop php74-php-fpm

设置开机启动

systemctl enable php74-php-fpm