How do I install APC Advanced php caching on my linux server?

Important Notes:
APC is a PHP module that creates a cache for PHP files called by Apache.  You will want to install APC if you are having the following issues:

1. Your server has Fedora Core 7 or Centos 5.x or above and at least PHP 5.1.6
2. You have a PHP/MySQL driven page
3. You are experiencing performance lag and have already done performance tuning of MySQL

Getting Started:

1. Log into your server using SSH
   
   
2. Once you have connected to the server you are going to run the following commands:
   
   

   [root@hostname]#yum install php-pear [root@hostname]#yum install php-devel [root@hostname]#yum install httpd-devel [root@hostname]#pecl install apc

   
   
3. Now APC is installed, we just need to enable it on the domain(s) that require APC.  To do this, we need to copy apc.php from /usr/share/php/ to the httpdocs directory of the domain that needs APC.  Use the following command:
   
   

   [root@hostname]#cp /usr/share/php/apc.php /var/www/vhosts/DOMAINNAME.COM/httpdocs

4. Now we need to create a file so PHP knows that APC is installed.  Issue the following command:
   
   

   [root@hostname]#vi /etc/php.d/apc.ini then insert the following line into the text document: extension=apc.so

   
   
5. You will now need to restart the web server with the following command:
   
   

   [root@hostname]#/usr/local/psa/admin/bin/websrvmng -av

6. Finally, you need to copy the file to the root of the domain that requires APC:
   
   

   [root@hostname]#cp /usr/share/php/apc.php /var/www/vhosts/DOMAINNAME.COM/httpdocs

7. You can now test to see if APC is installed by going to http://DOMAINNAME.COM/apc.php

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