The Alternative PHP Cache (APC) is a bytecode optimization opcode cache for PHP. This free cache leads to faster runtime execution as it stores the final, compiled result in shared memory. To install APC, you can setup using YUM.
[root@localhost ~]# yum install php-pecl-apc
Using YUM method, it will create /etc/php.d/apc.ini , enabling apc extension module "extension = apc.so". If apc.ini is not found, you can insert "extension = apc.so" into php.ini.
After apache restart(service httpd restart), you will see apc enabled in phpinfo.php.
