在CentOS 8上安装PHP、Redis和phpredis

骑猪看日落 2023-10-05 10:28 49阅读 0赞

本教程介绍了如何通过默认的CentOS 8软件包管理器DNF来安装PHP扩展phpredis。它还将介绍在CentOS 8上PHP 7.4和Redis的安装。

PECL（PHP扩展社区库）是C扩展的存储库，这些C扩展直接加载到PHP中。[PHP扩展][PHP]扩展了PHP的功能。可以使用*pecl*命令安装PECL扩展。软件包存储库还提供了PHP扩展。使用哪个的决定通常取决于如何安装PHP。

步骤1：安装PHP 7.4

CentOS 8提供了PHP 7.2和PHP 7.3以便在默认存储库中进行安装。PHP 7.2将在6个月内接近停产，PHP 7.3将在18个月内接近停产。安装PHP 7.4可提高速度部门的工作效率，并确保获得更长的支持期限。

1.首先，运行以下命令来设置Remi存储库，该存储库将提供我们要安装的PHP 7.4和phpredis软件包以及一些方便的[软件包管理][Link 1]实用程序。

\[root@centos8 ~\]\# dnf install dnf-utils http://rpms.remirepo.net/enterprise/remi-release-8.rpm -y

2.接下来，通过运行查看可用的PHP模块。

\[root@centos8 ~\]\# dnf module list php

输出应如下所示。

\[root@centos8 ~\]\# dnf module list php

Extra Packages for Enterprise Linux Modular 8 - x86\_64 208 kB/s | 117 kB 00:00

Extra Packages for Enterprise Linux 8 - x86\_64 3.8 MB/s | 6.6 MB 00:01

Remi's Modular repository for Enterprise Linux 8 - x86\_64 456 kB/s | 567 kB 00:01

Safe Remi's RPM repository for Enterprise Linux 8 - x86\_64 1.1 MB/s | 1.5 MB 00:01

CentOS-8 - AppStream

Name Stream Profiles Summary

php 7.2 \[d\] common \[d\], devel, minimal PHP scripting language

php 7.3 common, devel, minimal PHP scripting language

Remi's Modular repository for Enterprise Linux 8 - x86\_64

Name Stream Profiles Summary

php remi-7.2 common \[d\], devel, minimal PHP scripting language

php remi-7.3 common \[d\], devel, minimal PHP scripting language

php remi-7.4 common \[d\], devel, minimal PHP scripting language

Hint: \[d\]efault, \[e\]nabled, \[x\]disabled, \[i\]nstalled

3.接下来，为了启用PHP remi-7.4流，请运行以下[dnf命令][dnf]。

\[root@centos8 ~\]\# dnf module reset php -y

\[root@centos8 ~\]\# dnf module enable php:remi-7.4 -y

4.最后，为了安装PHP，运行命令。

\[root@centos8 ~\]\# dnf install php -y

要验证PHP 7.4是否可用，请通过运行此命令检查版本。

\[root@centos8 ~\]\# php -v

PHP 7.4.6 (cli) (built: May 12 2020 08:09:15) ( NTS )

Zend Engine v3.4.0, Copyright (c) Zend Technologies

with Zend OPcache v7.4.6, Copyright (c), by Zend Technologies

步骤2：安装，启动和启用Redis

为了使用phpredis扩展，必须在系统上安装Redis。要安装Redis，请运行。

\[root@centos8 ~\]\# dnf install redis -y

接下来，[为了启动][Link 2]并使Redis在系统引导时启动，请运行以下命令。

\[root@centos8 ~\]\# systemctl enable --now redis

通过运行此命令来验证Redis是否正在运行。

\[root@centos8 ~\]\# systemctl enable --now redis.service

Created symlink /etc/systemd/system/multi-user.target.wants/redis.service → /usr/lib/systemd/system/redis.service.

\[root@centos8 ~\]\# systemctl status redis

● redis.service - Redis persistent key-value database

Loaded: loaded (/usr/lib/systemd/system/redis.service; enabled; vendor preset: disabled)

Drop-In: /etc/systemd/system/redis.service.d

└─limit.conf

Active: active (running) since Thu 2020-05-14 00:15:43 EDT; 4s ago

Main PID: 3606 (redis-server)

Tasks: 4 (limit: 8969)

Memory: 6.5M

CGroup: /system.slice/redis.service

└─3606 /usr/bin/redis-server 127.0.0.1:6379

May 14 00:15:43 centos8.awesome.com systemd\[1\]: Starting Redis persistent key-value database...

May 14 00:15:43 centos8.awesome.com systemd\[1\]: Started Redis persistent key-value database.

步骤＃3：安装phpredis

本教程开始时设置的Remi存储库提供了phpredis扩展的打包版本。这很方便，因为它消除了与pecl一起安装时所需的某些步骤。

1.为了安装phpredis，请运行以下命令。

\[root@centos8 ~\]\# dnf install -y php-pecl-redis5

运行以下命令以列出当前安装的PHP扩展，并在其中搜索Redis。

\[root@centos8 ~\]\# php -m | grep redis

redis

2.最后，作为一项好的措施，重新启动php-fpm。

\[root@centos8 ~\]\# systemctl restart php-fpm.service

PHP的扩展在[扩展PHP功能][PHP 1]方面非常有用。通过DNF之类的程序包管理器进行安装很方便，并且在大多数情况下，可以最大程度地减少启动和运行它们所需的精力。

现在，您的Redis PHP安装已完成

### **连接到Redis服务器** ###

<?php

//Connecting to Redis server on localhost

$redis = new Redis();

$redis->connect('127.0.0.1', 6379);

echo "Connection to server sucessfully";

//check whether server is running or not

echo "Server is running: ".$redis->ping();

执行该程序时，将产生以下结果。

Connection to server sucessfully

Server is running: PONG

### **Redis PHP字符串示例** ###

<?php

//Connecting to Redis server on localhost

$redis = new Redis();

$redis->connect('127.0.0.1', 6379);

echo "Connection to server sucessfully";

//set the data in redis string

$redis->set("tutorial-name", "Redis tutorial");

// Get the stored data and print it

echo "Stored string in redis:: " .$redis->get("tutorial-name");

执行上述程序时，将产生以下结果。

Connection to server sucessfully

Stored string in redis:: Redis tutorial

### **Redis PHP列表示例** ###

<?php

//Connecting to Redis server on localhost

$redis = new Redis();

$redis->connect('127.0.0.1', 6379);

echo "Connection to server sucessfully";

//store data in redis list

$redis->lpush("tutorial-list", "Redis");

$redis->lpush("tutorial-list", "Mongodb");

$redis->lpush("tutorial-list", "Mysql");

// Get the stored data and print it

$arList = $redis->lrange("tutorial-list", 0 ,5);

echo "Stored string in redis:: ";

print_r($arList);

执行上述程序时，将产生以下结果。

Connection to server sucessfully

Stored string in redis::

Redis

Mongodb

Mysql

### **Redis PHP密钥示例** ###

<?php

//Connecting to Redis server on localhost

$redis = new Redis();

$redis->connect('127.0.0.1', 6379);

echo "Connection to server sucessfully";

// Get the stored keys and print it

$arList = $redis->keys("*");

echo "Stored keys in redis::" ;

print_r($arList);

执行该程序时，将产生以下结果。

Connection to server sucessfully

Stored string in redis::

tutorial-name

tutorial-list

[PHP]: https://www.liquidweb.com/kb/how-to-list-compiled-php-modules-from-command-line/
[Link 1]: https://www.liquidweb.com/kb/dnf-dandified-yum-command-examples-install-remove-upgrade-and-downgrade/
[dnf]: https://www.liquidweb.com/kb/what-is-dnf-dandified-yum/
[Link 2]: https://www.liquidweb.com/products/server-clusters/
[PHP 1]: https://www.liquidweb.com/products/private-cloud/