一、安装前库文件和工具准备1、首先安装 epel 源
yum -y install epel-release
2.安装 remi 源
yum -y install http://rpms.remirepo.net/enterprise/remi-release-7.rpm
3.安装 yum 源管理工具
yum -y install yum-utils
二、安装php1.安装php
yum -y --enablerepo=remi install php74-php php74-php-fpm php74-php-bcmath php74-php-ctype php74-php-curl php74-php-dom php74-php-gd php74-php-hash php74-php-iconv php74-php-intl php74-php-mbstring php74-php-pdo_mysql php74-php-simplexml php74-php-soap php74-php-xsl php74-php-zip php74-php-xml php74-php-sockets php74-php-session php74-php-snmp php74-php-mysql php74-php-cli php74-php-json php74-php-mcrypt php74-php-mysqlnd php74-php-pecl-crypto php74-php-pecl-mcrypt php74-php-pecl-geoip php74-php-recode php74-php-xmll
2.重启一下计算机，不然有可能无法启动php
reboot
3.设置开机启动、运行服务
systemctl start php74-php-fpm systemctl enable php74-php-fpm
三、设置php1.查看php安装包
[root@vm-0-5-centos ~]# rpm -qa | grep php oniguruma5php-6.9.7.1-1.el7.remi.x86_64 php74-php-common-7.4.24-1.el7.remi.x86_64 php74-php-7.4.24-1.el7.remi.x86_64 php74-php-xml-7.4.24-1.el7.remi.x86_64 php74-php-pdo-7.4.24-1.el7.remi.x86_64 php74-php-pecl-mysql-1.0.0-0.23.20190415.d7643af.el7.remi.x86_64 php74-php-fpm-7.4.24-1.el7.remi.x86_64 php74-php-bcmath-7.4.24-1.el7.remi.x86_64 php74-php-pecl-recode-1.0.0~dev.20190723-4.el7.remi.x86_64 php74-runtime-1.0-3.el7.remi.x86_64 php74-php-mysqlnd-7.4.24-1.el7.remi.x86_64 php74-php-pecl-crypto-0.3.2-1.el7.remi.x86_64 php74-php-soap-7.4.24-1.el7.remi.x86_64 php74-php-intl-7.4.24-1.el7.remi.x86_64 php74-php-pecl-zip-1.19.5-1.el7.remi.x86_64 php74-php-json-7.4.24-1.el7.remi.x86_64 php74-php-cli-7.4.24-1.el7.remi.x86_64 php74-php-sodium-7.4.24-1.el7.remi.x86_64 php74-php-pecl-geoip-1.1.1-11.el7.remi.x86_64 php74-php-snmp-7.4.24-1.el7.remi.x86_64 php74-php-pecl-mcrypt-1.0.4-1.el7.remi.x86_64 php74-php-gd-7.4.24-1.el7.remi.x86_64 php74-php-mbstring-7.4.24-1.el7.remi.x86_64
2.找到：php74-php-fpm-7.4.24-1.el7.remi.x86_64安装位置
[root@vm-0-5-centos ~]# rpm -ql php74-php-fpm-7.4.24-1.el7.remi.x86_64/etc/logrotate.d/php74-php-fpm/etc/opt/remi/php74/php-fpm.conf/etc/opt/remi/php74/php-fpm.d/etc/opt/remi/php74/php-fpm.d/www.conf/etc/opt/remi/php74/sysconfig/php-fpm/etc/systemd/system/php74-php-fpm.service.d/opt/remi/php74/root/usr/sbin/php-fpm/opt/remi/php74/root/usr/share/doc/php74-php-fpm-7.4.24/opt/remi/php74/root/usr/share/doc/php74-php-fpm-7.4.24/php-fpm.conf.default/opt/remi/php74/root/usr/share/doc/php74-php-fpm-7.4.24/www.conf.default/opt/remi/php74/root/usr/share/fpm/opt/remi/php74/root/usr/share/fpm/status.html/opt/remi/php74/root/usr/share/licenses/php74-php-fpm-7.4.24/opt/remi/php74/root/usr/share/licenses/php74-php-fpm-7.4.24/fpm_license/opt/remi/php74/root/usr/share/man/man8/php-fpm.8.gz/usr/lib/systemd/system/php74-php-fpm.service/var/opt/remi/php74/lib/php/opcache/var/opt/remi/php74/lib/php/session/var/opt/remi/php74/lib/php/wsdlcache/var/opt/remi/php74/log/php-fpm/var/opt/remi/php74/run/php-fpm
3.查找php.ini位置：
[root@localhost src]# find /etc/opt/remi/php74 -name php.ini/etc/opt/remi/php74/php.ini
4.编辑/etc/opt/remi/php74/php.ini，替换 ;cgi.fix_pathinfo=1 为 cgi.fix_pathinfo=0 ;
[root@localhost src]# vim /etc/opt/remi/php74/php.ini cgi.fix_pathinfo=0
5.重启php74-php-fpm
systemctl restart php74-php-fpm
6.更多操作
systemctl restart php74-php-fpm #重启 systemctl start php74-php-fpm #启动 systemctl stop php74-php-fpm #关闭 systemctl status php74-php-fpm #检查状态
四、设置php软连接和环境变量1.建立php程序的软连接
ln -s /opt/remi/php74/root/usr/bin/php /usr/bin/php
2.修改rc文件
1.当前用户的环境变量
#如果是使用bash作为shell vim ~/.bashrc #增加一行环境变量 export path=/opt/remi/php74/root/usr/bin:$path #刷新一下环境变量 source ~/.bashrc
2.修改全局环境变量
vim /etc/profile export path=/opt/remi/php74/root/usr/bin:$path
查看 php
验证一下是否安装成功：
[root@vm-0-5-centos ~]# php -v php 7.4.24 (cli) (built: sep 21 2021 11:23:11) ( nts )copyright (c) the php group zend engine v3.4.0, copyright (c) zend technologies
上面安装 的php 只是安装了部分 php 拓展，更多的软件可见：
yum search php74
以上就是linux centos如何安装php7的详细内容。