安装源

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

搜索

yum search php74

安装PHP

yum install php74-php-gd  php74-php-pdo php74-php-mbstring php74-php-cli php74-php-fpm php74-php-mysqlnd

启动

service php74-php-fpm start