[CentOS] CentOS 6.5 - MySQL and Apache2 and PHP Configuration

Installing MySQL 5
To install MySQL, we do this:

[root@~]# yum -y install mysql mysql-server

Then we create the system startup links for MySQL (so that MySQL starts automatically whenever the system boots) and start the MySQL server:

chkconfig --levels 235 mysqld on
[root@~]# /etc/init.d/mysqld start

Set passwords for the MySQL root account:

mysql_secure_installation

[root@~]#  mysql_secure_installation

Installing Apache2
Apache2 is available as a CentOS package, therefore we can install it like this:

[root@~]# yum -y install httpd

Now configure your system to start Apache at boot time...

chkconfig --levels 235 httpd on

... and start Apache:

[root@~]# /etc/init.d/httpd start

Now direct your browser to http://192.168.0.100, and you should see the Apache2 placeholder page:


Apache's default document root is /var/www/html on CentOS, and the configuration file is /etc/httpd/conf/httpd.conf. Additional configurations are stored in the /etc/httpd/conf.d/ directory.



[root@~]# vi /etc/sysconfig/iptables

cofig files input
......
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT


[root@~]# service iptables restart


 Installing PHP5
We can install PHP5 and the Apache PHP5 module as follows:

[root@~]# yum -y install php


We must restart Apache afterwards:

[root@~]# /etc/init.d/httpd restart

5 Testing PHP5 / Getting Details About Your PHP5 Installation
The document root of the default web site is /var/www/html. We will now create a small PHP file (info.php) in that directory and call it in a browser. The file will display lots of useful details about our PHP installation, such as the installed PHP version.

[root@~]# vi /var/www/html/info.php

<?php
phpinfo();
?>

Now we call that file in a browser (e.g. http://192.168.0.100/info.php):


As you see, PHP5 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 PHP5. MySQL is not listed there which means we don't have MySQL support in PHP5 yet.



6 Getting MySQL Support In PHP5
To get MySQL support in PHP, we can install the php-mysql package. It's a good idea to install some other PHP5 modules as well as you might need them for your applications. You can search for available PHP5 modules like this:

[root@~]# yum search php

Pick the ones you need and install them like this:

[root@~]# yum -y install php-mysql

In the next step I will install some common PHP modules that are required by CMS Systems like Wordpress, Joomla and Drupal:

[root@~]# yum -y install php-gd php-imap php-ldap php-odbc php-pear php-xml php-xmlrpc php-mbstring php-mcrypt php-mssql php-snmp php-soap php-tidy curl curl-devel

APC is a free and open PHP opcode cacher for caching and optimizing PHP intermediate code. It's similar to other PHP opcode cachers, such as eAccelerator and Xcache. It is strongly recommended to have one of these installed to speed up your PHP page.

APC can be installed as follows:

[root@~]# yum -y install php-pecl-apc

Now restart Apache2:

[root@~]# /etc/init.d/httpd restart

Now reload http://localhost/info.php in your browser and scroll down to the modules section again. You should now find lots of new modules there, including the APC module:


phpMyAdmin
phpMyAdmin is a web interface through which you can manage your MySQL databases.

First we enable the RPMforge repository on our CentOS system as phpMyAdmin is not available in the official CentOS 6.5 repositories:

Import the RPMforge GPG key:

[root@~]# rpm --import http://dag.wieers.com/rpm/packages/RPM-GPG-KEY.dag.txt

On x86_64 systems:

[root@~]# yum -y install http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm

On i386 systems:

[root@~]# yum -y install http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.i686.rpm

phpMyAdmin can now be installed as follows:

[root@~]# 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 <Directory "/usr/share/phpmyadmin"> stanza):

[root@~]# vi /etc/httpd/conf.d/phpmyadmin.conf

#
#  Web application to manage MySQL
#

#<Directory "/usr/share/phpmyadmin">
#  Order Deny,Allow
#  Deny from all
#  Allow from 127.0.0.1
#</Directory>

Alias /phpmyadmin /usr/share/phpmyadmin
Alias /phpMyAdmin /usr/share/phpmyadmin
Alias /mysqladmin /usr/share/phpmyadmin
Next we change the authentication in phpMyAdmin from cookie to http:

[root@~]# vi /usr/share/phpmyadmin/config.inc.php

[...]

/* Authentication type */
$cfg['Servers'][$i]['auth_type'] = 'http';

or

$cfg['Servers'][$i]['auth_type'] = 'cookie';

[...]
Restart Apache:

[root@~]# /etc/init.d/httpd restart

Afterwards, you can access phpMyAdmin under http://localhost/phpmyadmin/: