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Configure PHP in CentOS Linux
PHP is the one of the most prolific web languages in use today. Installing a LAMP Stack on CentOS is something every system administrator will need to perform, most likely sooner than later.
A traditional LAMP Stack consists of (L)inux (A)pache (M)ySQL (P)HP.
There are three main components to a LAMP Stack on CentOS −
- Web Server
- Web Development Platform / Language
- Database Server
Note − The term LAMP Stack can also include the following technologies: PostgreSQL, MariaDB, Perl, Python, Ruby, NGINX Webserver.
For this tutorial, we will stick with the traditional LAMP Stack of CentOS GNU Linux: Apache web server, MySQL Database Server, and PHP.
We will actually be using MariaDB. MySQL configuration files, databases and tables are transparent to MariaDB. MariaDB is now included in the standard CentOS repository instead of MySQL. This is due to the limitations of licensing and open-source compliance, since Oracle has taken over the development of MySQL.
The first thing we need to do is install Apache.
[root@CentOS]# yum install httpd Loaded plugins: fastestmirror, langpacks base | 3.6 kB 00:00:00 extras | 3.4 kB 00:00:00 updates | 3.4 kB 00:00:00 extras/7/x86_64/primary_d | 121 kB 00:00:00 Loading mirror speeds from cached hostfile * base: mirror.sigmanet.com * extras: linux.mirrors.es.net * updates: mirror.eboundhost.com Resolving Dependencies --> Running transaction check ---> Package httpd.x86_64 0:2.4.6-45.el7.centos will be installed --> Processing Dependency: httpd-tools = 2.4.6-45.el7.centos for package: httpd-2.4.6-45.el7.centos.x86_64 --> Processing Dependency: /etc/mime.types for package: httpd-2.4.645.el7.centos.x86_64 --> Running transaction check ---> Package httpd-tools.x86_64 0:2.4.6-45.el7.centos will be installed ---> Package mailcap.noarch 0:2.1.41-2.el7 will be installed --> Finished Dependency Resolution Installed: httpd.x86_64 0:2.4.6-45.el7.centos Dependency Installed: httpd-tools.x86_64 0:2.4.6-45.el7.centos mailcap.noarch 0:2.1.41-2.el7 Complete! [root@CentOS]#
Let's configure httpd service.
[root@CentOS]# systemctl start httpd && systemctl enable httpd
Now, let's make sure the web-server is accessible through firewalld.
bash-3.2# nmap -sS -p 1-1024 -T 5 -sV 10.211.55.1 Starting Nmap 7.30 ( https://nmap.org ) at 2017-01-28 02:00 MST Nmap scan report for centos.shared (10.211.55.1) Host is up (0.00054s latency). Not shown: 1022 filtered ports PORT STATE SERVICE VERSION 22/tcp open ssh OpenSSH 6.6.1 (protocol 2.0) 80/tcp open http Apache httpd 2.4.6 ((CentOS)) Service detection performed. Please report any incorrect results at https://nmap.org/submit/ . Nmap done: 1 IP address (1 host up) scanned in 10.82 seconds bash-3.2#
As you can see by the nmap service probe, Apache webserver is listening and responding to requests on the CentOS host.
Install MySQL Database Server
[root@CentOS rdc]# yum install mariadb-server.x86_64 && yum install mariadb- devel.x86_64 && mariadb.x86_64 && mariadb-libs.x86_64
We are installing the following repository packages for MariaDB −
mariadb-server.x86_64
The main MariaDB Server daemon package.
mariadb-devel.x86_64
Files need to compile from the source with MySQL/MariaDB compatibility.
mariadb.x86_64
MariaDB client utilities for administering MariaDB Server from the command line.
mariadb-libs.x86_64
Common libraries for MariaDB that could be needed for other applications compiled with MySQL/MariaDB support.
Now, let's start and enable the MariaDB Service.
[root@CentOS]# systemctl start mariadb [root@CentOS]# systemctl enable mariadb
Note − Unlike Apache, we will not enable connections to MariaDB through our host-based firewall (firewalld). When using a database server, it's considered best security practice to only allow local socket connections, unless the remote socket access is specifically needed.
Let's make sure the MariaDB Server is accepting connections.
[root@CentOS#] netstat -lnt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN
tcp 0 0 192.168.122.1:53 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN
[root@CentOS rdc]#
As we can see, MariaDB is listening on port 3306 tcp. We will leave our host-based firewall (firewalld) blocking incoming connections to port 3306.
Install and Configure PHP
[root@CentOS#] yum install php.x86_64 && php-common.x86_64 && php-mysql.x86_64 && php-mysqlnd.x86_64 && php-pdo.x86_64 && php-soap.x86_64 && php-xml.x86_64
I'd recommend installing the following php packages for common compatibility −
- php-common.x86_64
- php-mysql.x86_64
- php-mysqlnd.x86_64
- php-pdo.x86_64
- php-soap.x86_64
- php-xml.x86_64
[root@CentOS]# yum install -y php-common.x86_64 php-mysql.x86_64 php- mysqlnd.x86_64 php-pdo.x86_64 php-soap.x86_64 php-xml.x86_64
This is our simple php file located in the Apache webroot of /var/www/html/
[root@CentOS]# cat /var/www/html/index.php
<html>
<head>
<title>PHP Test Page</title>
</head>
<body>
PHP Install
<?php
echo "We are now running PHP on GNU Centos Linux!<br />"
?>
</body>
</html>
[root@CentOS]#
Let's change the owning group of our page to the system user our http daemon is running under.
[root@CentOS]# chgrp httpd /var/www/html/index.php && chmod g+rx /var/www/html/index.php ---
When requested manually via ncat.
bash-3.2# ncat 10.211.55.1 80
GET / index.php
HTTP/1.1 200 OK
Date: Sat, 28 Jan 2017 12:06:02 GMT
Server: Apache/2.4.6 (CentOS) PHP/5.4.16
X-Powered-By: PHP/5.4.16
Content-Length: 137
Connection: close
Content-Type: text/html; charset=UTF-8
<html>
<head>
<title>PHP Test Page</title>
</head>
<body>
PHP Install
We are now running PHP on GNU Centos Linux!<br />
</body>
</html>
bash-3.2#
PHP and LAMP are very popular web-programming technologies. LAMP installation and configuration is sure to come up on your list of needs as a CentOS Administrator. Easy to use CentOS packages have taken a lot of work from compiling Apache, MySQL, and PHP from the source code.