In this tutorial, I use the hostname server1.example.com with the IP p 192.168.1.100. These settings might differ for you, so you have to replace them where appropriate.
I will add the EPEL repo here to install latest phpMyAdmin as follows:
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY* yum -y install epel-release
To edit files on the shell, I’ll install the nano editor. If you prefer vi for file editing, then skip this step.
yum -y install nano
Installing MySQL / MariaDB
MariaDB is a MySQL fork of the original MySQL developer Monty Widenius. MariaDB is compatible with MySQL and I’ve chosen to use MariaDB here instead of MySQL. Run this command to install MariaDB with yum:
yum -y install mariadb-server mariadb
Then we create the system startup links for MySQL (so that MySQL starts automatically whenever the system boots) and start the MySQL server:
systemctl start mariadb.service systemctl enable mariadb.service
Set passwords for the MySQL root account:
[root@server1 ~]# mysql_secure_installation
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY! In order to log into MariaDB to secure it, we'll need the current password for the root user. If you've just installed MariaDB, and you haven't set the root password yet, the password will be blank, so you should just press enter here. Enter current password for root (enter for none): <--ENTER OK, successfully used password, moving on... Setting the root password ensures that nobody can log into the MariaDB root user without the proper authorisation. Set root password? [Y/n] New password: <--yourmariadbpassword Re-enter new password: <--yourmariadbpassword Password updated successfully! Reloading privilege tables.. ... Success! By default, a MariaDB installation has an anonymous user, allowing anyone to log into MariaDB without having to have a user account created for them. This is intended only for testing, and to make the installation go a bit smoother. You should remove them before moving into a production environment. Remove anonymous users? [Y/n] <--ENTER ... Success! Normally, root should only be allowed to connect from 'localhost'. This ensures that someone cannot guess at the root password from the network. Disallow root login remotely? [Y/n] <--ENTER ... Success! By default, MariaDB comes with a database named 'test' that anyone can access. This is also intended only for testing, and should be removed before moving into a production environment. Remove test database and access to it? [Y/n] <--ENTER - Dropping test database... ... Success! - Removing privileges on test database... ... Success! Reloading the privilege tables will ensure that all changes made so far will take effect immediately. Reload privilege tables now? [Y/n] <--ENTER ... Success! Cleaning up... All done! If you've completed all of the above steps, your MariaDB installation should now be secure. Thanks for using MariaDB! [root@server1 ~]#
CentOS 7 ships with Apache 2.4. Apache is directly available as a CentOS 7 package, therefore we can install it like this:
yum -y install httpd
Here a screenshot of the installation process.
Now configure your system to start Apache at boot time…
systemctl start httpd.service systemctl enable httpd.service
To be able to access the web server from outside, we have to open the HTTP (80) and HTTPS (443) ports in the firewall. The default firewall on CentOS is firewalld which can be configured with the firewalld-cmd command.
firewall-cmd --permanent --zone=public --add-service=http firewall-cmd --permanent --zone=public --add-service=https firewall-cmd --reload
Now direct your browser to the IP address of your server, in my case http://192.168.1.100, and you should see the Apache placeholder page:
The PHP version that ships with CentOS as default is quite old (PHP 5.4). Therefore I will show you in this chapter some options to install newer PHP versions like PHP 7.0 or 7.1 from Remi repository.
Add the Remi CentOS repository.
rpm -Uvh http://rpms.remirepo.net/enterprise/remi-release-7.rpm
Install yum-utils as we need the yum-config-manager utility.
yum -y install yum-utils
and run yum update
Now you have to chose which PHP version you want to use on the server. If you like to use PHP 5.4, then proceed to chapter 4.1. To install PHP 7.0, follow the commands in chapter 4.2, for PHP 7.1 chapter 4.3 and for PHP 7.1, use chapter 4.4 instead. Follow just one of the 4.x chapters and not all of them as you can only use one PHP version at a time with Apache mod_php.
Install PHP 5.4
To install PHP 5.4, run this command:
yum -y install php
Install PHP 7.0
We can install PHP 7.0 and the Apache PHP 7.0 module as follows:
yum-config-manager --enable remi-php70 yum -y install php php-opcache
Install PHP 7.1
If you want to use PHP 7.1 instead, use:
yum-config-manager --enable remi-php71 yum -y install php php-opcache
Install PHP 7.2
If you want to use PHP 7.2 instead, use:
yum-config-manager --enable remi-php72 yum -y install php php-opcache
In this example and in the downloadable virtual machine, I’ll use PHP 7.2.
We must restart Apache to apply the changes:
systemctl restart httpd.service
Testing PHP / Getting Details About Your PHP Installation
The document root of the default website is /var/www/html. We will create a small PHP file (info.php) in that directory and call it in a browser to test the PHP installation. The file will display lots of useful details about our PHP installation, such as the installed PHP version.
Now we call that file in a browser (e.g. http://192.168.1.100/info.php):
As you see, PHP 7.2 is working, and it’s working through the Apache 2.0 Handler, as shown in the Server API line. If you scroll further down, you will see all modules that are already enabled in PHP. MySQL is not listed there which means we don’t have MySQL support in PHP yet.
Getting MySQL Support In PHP
To get MySQL support in PHP, we can install the php-mysqlnd package. It’s a good idea to install some other PHP modules as well as you might need them for your applications. You can search for available PHP5 modules like this:
yum search php
Pick the ones you need and install them like this:
yum -y install php-mysqlnd php-pdo
In the next step I will install some common PHP modules that are required by CMS Systems like WordPress, Joomla, and Drupal:
yum -y install php-gd php-ldap php-odbc php-pear php-xml php-xmlrpc php-mbstring php-soap curl curl-devel
Now restart Apache web server:
systemctl restart httpd.service
Now reload http://192.168.1.100/info.php in your browser and scroll down to the modules section again. You should now find lots of new modules like curl etc there.:
If you don’t need the php info output anymore, then delete that file for security reasons.
phpMyAdmin is a web interface through which you can manage your MySQL databases. phpMyAdmin can now be installed as follows:
yum -y install phpMyAdmin
Now we configure phpMyAdmin. We change the Apache configuration so that phpMyAdmin allows connections not just from localhost (by commenting out the <RequireAny> stanza and adding the ‘Require all granted’ line):
[...] Alias /phpMyAdmin /usr/share/phpMyAdmin Alias /phpmyadmin /usr/share/phpMyAdmin <Directory /usr/share/phpMyAdmin/> AddDefaultCharset UTF-8 <IfModule mod_authz_core.c> # Apache 2.4 # <RequireAny> # Require ip 127.0.0.1 # Require ip ::1 # </RequireAny> Require all granted </IfModule> <IfModule !mod_authz_core.c> # Apache 2.2 Order Deny,Allow Deny from All Allow from 127.0.0.1 Allow from ::1 </IfModule> </Directory> <Directory /usr/share/phpMyAdmin/> Options none AllowOverride Limit Require all granted </Directory> [...]
Next, we change the authentication in phpMyAdmin from cookie to http:
[...] $cfg['Servers'][$i]['auth_type'] = 'http'; // Authentication method (config, http or cookie based)? [...]
systemctl restart httpd.service
Afterwards, you can access phpMyAdmin under http://192.168.1.100/phpmyadmin/: