How to Enable APC With PHP on Linux CentOS 6.4/RHEL

1. Introduction
The Alternative PHP Cache (APC) is a free, open, and robust framework for caching and optimizing PHP intermediate code. It’s an PECL extension which shares the packaging and distribution system with its sister, PEAR. In this post, i will show how to enable APC (Alternative PHP Cache) and makes PHP be fast.
2. Install APC
Step 1. Install using yum command :

# yum install php-pecl-apc -y

Step 2. Specify shared memory :

# vi /etc/php.d/apc.ini

On Line 16, specify shared memory size :

Step 3. Restart Apache :

# /etc/rc.d/init.d/httpd restart
Step 4. Create “phpinfo” and please make sure APC has been enabled :
# vi /var/www/html/phpinfo.php 

Code <?php
phpinfo();
?>
Step 5: In the browser access the following address:http://ip/phpinfo.php

example

http://192.168.1.34/phpinfo.php

 I hope above steps will help you to install APC on your server. 
 Good Luck For You!!