linux 安装php7.2
1、查看PHP版本
php -v
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2、删除旧php
yum remove php*
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3、安装epel
sudo yum install epel-release
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4、安装remi
sudo yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm
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5、安装yum-utils
sudo yum install yum-utils
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6、Enable remi repo
sudo yum-config-manager --enable remi-php72
sudo yum update
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7、安装php7.2
sudo yum install php72
sudo yum install php72-php-fpm php72-php-gd php72-php-json php72-php-mbstring php72-php-mysqlnd php72-php-xml php72-php-xmlrpc php72-php-opcache
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8、安装完成，查看当前php版本
php -v
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常用php扩展
yum install php72w php72w-cli php72w-common php72w-devel php72w-embedded php72w-fpm php72w-gd php72w-mbstring php72w-mysqlnd php72w-opcache php72w-pdo php72w-xml php72w-ldap php72w-mcrypt
