在CentOS的7官方软件仓库有PHP 5.4已经走到了生命的结束，由开发商不再积极维护。

要了解最新功能和安全更新，您需要在CentOS 7系统上使用更新的（可能是最新的）PHP版本。

在CentOS 7上安装PHP 7

安装必要

yum -y install gcc gcc-c++

1.要安装PHP 7，您必须使用以下命令在CentOS 7系统上安装和启用EPEL和Remi存储库。

#yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
#yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm

2.接下来，您需要安装yum-utils，这是一组用于管理yum存储库和包的有用程序。它有基本上扩展yum默认功能的工具。

它可用于管理（启用或禁用）yum存储库以及包，无需任何手动配置等等。

#yum -y install yum-utils

3. yum-utils提供的程序之一是yum-config-manager，您可以使用它来启用Remi存储库作为安装不同PHP版本的默认存储库，如图所示。

#yum-config-manager --enable remi-php71 [ 安装PHP 7.1 ]
#yum-config-manager --enable remi-php72 [ 安装PHP 7.2 ]
#yum-config-manager --enable remi-php73 [ 安装PHP 7.3 ]

4.现在使用以下命令安装PHP 7以及所有必需的模块。

#yum -y install php php-mcrypt php-devel php-cli php-gd php-pear php-curl php-fpm php-mysql php-ldap php-zip php-fileinfo

5.查看php版本

[root@VM_159_140_centos lnmp]# php -v
PHP 7.1.28 (cli) (built: Apr  2 2019 17:49:56) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2018 Zend Technologies

6.启动php-fpm

systemctl start php-fpm

开启启动

systemctl enable php-fpm.service

查看php.ini文件位置

[root@VM_159_140_centos ~]# php -ini
phpinfo()
PHP Version => 7.1.28
System => Linux VM_159_140_centos 3.10.0-514.26.2.el7.x86_64 #1 SMP Tue Jul 4 15:04:05 UTC 2017 x86_64
Build Date => Apr  2 2019 17:49:32
Server API => Command Line Interface
Virtual Directory Support => disabled
Configuration File (php.ini) Path => /etc
Loaded Configuration File => /etc/php.ini
Scan this dir for additional .ini files => /etc/php.d
Additional .ini files parsed => /etc/php.d/20-bz2.ini,
/etc/php.d/20-calendar.ini,
/etc/php.d/20-ctype.ini,
/etc/php.d/20-curl.ini,
/etc/php.d/20-dom.ini,
/etc/php.d/20-exif.ini,
/etc/php.d/20-fileinfo.ini,
/etc/php.d/20-ftp.ini,
/etc/php.d/20-gd.ini,
/etc/php.d/20-gettext.ini,
/etc/php.d/20-iconv.ini,
/etc/php.d/20-json.ini,
/etc/php.d/20-ldap.ini,
/etc/php.d/20-mcrypt.ini,
/etc/php.d/20-mysqlnd.ini,
/etc/php.d/20-pdo.ini,
/etc/php.d/20-phar.ini,
/etc/php.d/20-posix.ini,
/etc/php.d/20-redis.ini,
/etc/php.d/20-shmop.ini,
/etc/php.d/20-simplexml.ini,
/etc/php.d/20-sockets.ini,
/etc/php.d/20-sqlite3.ini,
/etc/php.d/20-sysvmsg.ini,
/etc/php.d/20-sysvsem.ini,
/etc/php.d/20-sysvshm.ini,
/etc/php.d/20-tokenizer.ini,
/etc/php.d/20-xml.ini,
/etc/php.d/20-xmlwriter.ini,
/etc/php.d/20-xsl.ini,
/etc/php.d/30-mysqli.ini,
/etc/php.d/30-pdo_mysql.ini,
/etc/php.d/30-pdo_sqlite.ini,
/etc/php.d/30-wddx.ini,
/etc/php.d/30-xmlreader.ini,
/etc/php.d/40-zip.ini,
/etc/php.d/50-swoole.ini

pecl安装扩展准备

[root@VM_159_140_centos default]# yum -y install php-pear
[root@VM_159_140_centos default]# pecl
Commands:
build                  Build an Extension From C Source
bundle                 Unpacks a Pecl Package
channel-add            Add a Channel
channel-alias          Specify an alias to a channel name
channel-delete         Remove a Channel From the List

……………………………………………

pecl安装redis

[root@VM_159_140_centos www]# pecl install redis
You should add "extension=redis.so" to php.ini
[root@VM_159_140_centos www]# echo "extension=redis.so;" >> /etc/php.d/20-redis.ini

错误

checking for igbinary includes... configure: error: Cannot find igbinary.h
[root@VM_159_140_centos www]# pecl install igbinary
You should add "extension=igbinary.so" to php.ini
[root@VM_159_140_centos www]# echo "extension=igbinary.so;" >> /etc/php.d/20-redis.ini

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