wget http://garr.dl.sourceforge.net/project/eaccelerator/eaccelerator/eAccelerator%200.9.6.1/eaccelerator-0.9.6.1.zip
unzip eaccelerator-0.9.6.1.zip
cd eaccelerator-0.9.6.1
# yum -y install autoconf
# phpize
# ./configure
# make
# make install

Add the following lines at the end of php.ini
————-
extension=”eaccelerator.so”
eaccelerator.shm_size=”16″
eaccelerator.cache_dir=”/var/cache/eaccelerator”
eaccelerator.enable=”1″
eaccelerator.optimizer=”1″
eaccelerator.check_mtime=”1″
eaccelerator.debug=”0″
eaccelerator.filter=”"
eaccelerator.shm_max=”0″
eaccelerator.shm_ttl=”0″
eaccelerator.shm_prune_period=”0″
eaccelerator.shm_only=”0″
eaccelerator.compress=”1″
eaccelerator.compress_level=”9″
————-

mkdir /var/cache/eaccelerator
chmod 0777 /var/cache/eaccelerator

Restart apache.