centos7安裝php環境的正確方法是什么

yum?install?httpd

vi?/etc/httpd/conf/httpd.conf

firewall-cmd?--permanent?--zone=public?--add-port=80/tcp?//添加80端口 firewall-cmd?--reload?//生效

firewall-cmd?--permanent?--zone=public?--list-ports?//查看開放端口列表

systemctl?start?httpd.service

yum?install?mysql?mysql-server

systemctl?start?mysqld.service

yum?install?php?php-devel

<?php       phpinfo();  ?>

yum?install?php-mysql?php-gd?php-imap?php-ldap?php-odbc?php-pear?php-xml?php-xmlrpc

<?php $servername = "localhost"; $username = "username"; $password = "password";   // 創建連接 $conn = new mysqli($servername, $username, $password);   // 檢測連接 if ($conn->connect_error)?{ ????die("連接失敗:?"?.?$conn-&gt;connect_error); }? echo?"連接成功"; ?&gt;