VM虚拟机 CentOS7 安装PHP 环境
之前安装过PHP 云服务器环境，但是没有深究， 停留在粗浅层次，我记性不好 记点东西 防止自己遗忘
PHP 服务器 安装分两种 一种YUM 安装 一种编译安装 （由于linux机制，每个文件夹都有他指定的含义，不可随意使用，编译安装需要了解，文件夹分类信息，YUM 安装则不需要去考虑，因为他已经帮你固定安装好了目录，这就是网上为什么 推荐yum的原因） （文中例子 是不必要操作，可了解但不是必须，个人建议 理解一下）
YUM安装注意事项
1进入ROOT 权限(虚拟机) su 命令 接着输入密码 前缀带ROOT 即成功 CD / （切换到根目录，可不用操作怕误导 注释出来）
[PCname@localhost ~]$ su
password：
[root@localhost PCname]# cd /
2.更换安装YUM 源
如果 默认 输入 yum install php 这样 默认安装的会是5.4的PHP 但是 我们现阶段 基本上都是5.6 以及PHP7 的版本 此时我们就需要更换YUM源。
CentOS 6.x 源
rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm
rpm -Uvh https://mirror.webtatic.com/yum/el6/latest.rpm
CentOS 7.x 源
rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
例子：查看该源对应的安装包命令（以PHP 为例）
yum list --enablerepo=webtatic | grep php例子：获得信息如下 （截取部分）
[root@localhost /]# yum list --enablerepo=webtatic | grep php
emacs-php-mode.noarch 1.18.2-1.el7 base
geos-php.x86_64 3.4.2-2.el7 epel
graphviz-php.x86_64 2.30.1-21.el7 base
mlt-php.x86_64 6.4.1-4.el7 epel
mod_php71w.x86_64 7.1.24-1.w7 webtatic
mod_php72w.x86_64 7.2.12-1.w7 webtatic
php.x86_64 5.4.16-46.el7 base
php-Assetic.noarch 1.3.2-3.el7 epel
php-EasyRdf.noarch 0.9.0-1.el7 epel
php-EasyRdf-doc.noarch 0.9.0-1.el7 epel
php-Faker.noarch 1.5.0-5.el7 epel
php-IDNA_Convert.noarch 0.8.0-2.el7 epel
php-JMSParser.noarch 1.0.0-9.el7 epel
php-JsonSchema.noarch 1.6.1-1.el7 epel
php-Metadata.noarch 1.6.0-1.el7 epel
php-Monolog.noarch 1.22.0-1.el7 epel 例子：查询5.6版本PHP 命令（也可以查 其他软件）
yum search php56w
例子：显示结果
[root@localhost yum.repos.d]# yum search php56w
已加载插件：fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: mirrors.163.com
* epel: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.163.com
* webtatic: uk.repo.webtatic.com
============================= N/S matched: php56w ==============================
php56w.x86_64 : PHP scripting language for creating dynamic web sites
php56w-bcmath.x86_64 : A module for PHP applications for using the bcmath
: library
php56w-cli.x86_64 : Command-line interface for PHP
php56w-common.x86_64 : Common files for PHP
php56w-dba.x86_64 : A database abstraction layer module for PHP applications
php56w-devel.x86_64 : Files needed for building PHP extensions
php56w-embedded.x86_64 : PHP library for embedding in applications
php56w-enchant.x86_64 : Enchant spelling extension for PHP applications
php56w-fpm.x86_64 : PHP FastCGI Process Manager
php56w-gd.x86_64 : A module for PHP applications for using the gd graphics
: library
php56w-imap.x86_64 : A module for PHP applications that use IMAP
php56w-interbase.x86_64 : A module for PHP applications that use
: Interbase/Firebird databases
php56w-intl.x86_64 : Internationalization extension for PHP applications
php56w-ldap.x86_64 : A module for PHP applications that use LDAP
php56w-mbstring.x86_64 : A module for PHP applications which need multi-byte
: string handling
php56w-mcrypt.x86_64 : Standard PHP module provides mcrypt library support
php56w-mssql.x86_64 : MSSQL database module for PHP
php56w-mysql.x86_64 : A module for PHP applications that use MySQL databases
php56w-mysqlnd.x86_64 : A module for PHP applications that use MySQL databases
php56w-odbc.x86_64 : A module for PHP applications that use ODBC databases
php56w-opcache.x86_64 : An opcode cache Zend extension
php56w-pdo.x86_64 : A database access abstraction module for PHP applications
php56w-pear.noarch : PHP Extension and Application Repository framework
php56w-pecl-apcu.x86_64 : APCu - APC User Cache
php56w-pecl-apcu-devel.x86_64 : APCu developer files (header)
php56w-pecl-gearman.x86_64 : PHP wrapper to libgearman
php56w-pecl-geoip.x86_64 : Extension to map IP addresses to geographic places
php56w-pecl-igbinary.x86_64 : Replacement for the standard PHP serializer
php56w-pecl-igbinary-devel.x86_64 : Igbinary developer files (header)
php56w-pecl-imagick.x86_64 : Provides a wrapper to the ImageMagick library
php56w-pecl-imagick-devel.x86_64 : Imagick developer files (header)
php56w-pecl-libsodium.x86_64 : Wrapper for the Sodium cryptographic library
php56w-pecl-memcache.x86_64 : Extension to work with the Memcached caching
: daemon
php56w-pecl-memcached.x86_64 : Extension to work with the Memcached caching
: daemon
php56w-pecl-mongodb.x86_64 : PECL package MongoDB driver
php56w-pecl-redis.x86_64 : Extension for communicating with the Redis key-value
: store
php56w-pecl-xdebug.x86_64 : PECL package for debugging PHP scripts
php56w-pgsql.x86_64 : A PostgreSQL database module for PHP
php56w-phpdbg.x86_64 : Interactive PHP debugger
php56w-process.x86_64 : Modules for PHP script using system process interfaces
php56w-pspell.x86_64 : A module for PHP applications for using pspell interfaces
php56w-recode.x86_64 : A module for PHP applications for using the recode
: library
php56w-snmp.x86_64 : A module for PHP applications that query SNMP-managed
: devices
php56w-soap.x86_64 : A module for PHP applications that use the SOAP protocol
php56w-tidy.x86_64 : Standard PHP module provides tidy library support
php56w-xml.x86_64 : A module for PHP applications which use XML
php56w-xmlrpc.x86_64 : A module for PHP applications which use the XML-RPC
: protocol
名称和简介匹配 only，使用“search all”试试。
2.安装Apache
yum install httpd httpd-devel 启动apache:
/bin/systemctl start httpd.service此时 用浏览器 访问你服务器IP地址 应该是
这样表示安装成功
笔记：
systemctl stop firewalld.service #停止firewall
systemctl disable firewalld.service #禁止firewall开机启动
firewall-cmd --state #查看默认防火墙状态（关闭后显示notrunning，开启后显示running）
2.安装mysql:
yum install mysql mysql-server启动mysql:
systemctl start mysql.service如果报错
[root@localhost yum.repos.d]# systemctl start mysql.service
Failed to start mysql.service: Unit mysql.service failed to load: No such file or directory.
或者
Failed to start mysqld.service: Unit not found则安装 mariadb-server
yum install -y mariadb-server启动服务
systemctl start mariadb.service添加到开机启动
systemctl enable mariadb.service
//键入命令
[root@localhost /]# systemctl enable mariadb.service
Created symlink from /etc/systemd/system/multi-user.target.wants/mariadb.service to /usr/lib/systemd/system/mariadb.service.
//进入MYSQL
[root@localhost /]# mysql -uroot -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 2
Server version: 5.5.60-MariaDB MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]>
键入EXIT+ 回车退出MYSQL
搞定~
3.安装PHP
yum install php56w重启apache使php生效
/bin/systemctl start httpd.service查看 PHP 版本 php -v
[root@localhost /]# php -v
PHP 5.6.38 (cli) (built: Sep 15 2018 08:16:33)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
进入文件目录
cd / (进入根目录)
cd var/www/html
ls 查看文件列表
vi 编辑文件
[root@localhost www]# cd /var/www/html/
[root@localhost html]# touch index.php
[root@localhost html]# ls
index.php
[root@localhost html]# vi index.php
i/a 开始编辑文件
输入
按ESC （结束文本操作） 输入 :wq （保存并退出）
访问查看PHP 配置文件