命令如下：
yum install autoconf
yum install automake
cd /usr/local/src
mkdir eAccelerator
cd eAccelerator
wget http://bart.eaccelerator.net/source/0.9.6/eaccelerator-0.9.6.tar.bz2
tar -xvjf eaccelerator-0.9.6.tar.bz2
cd eaccelerator-0.9.6
export PHP_PREFIX="/usr/local"
$PHP_PREFIX/bin/phpize
./configure --enable-eaccelerator=shared --with-php-config=$PHP_PREFIX/bin/php-config
make && make install
cd /tmp
mkdir eaccelerator
chmod 0777 eaccelerator
编辑你用DirectAdmin的vps所在的php.ini
vi /usr/local/lib/php.ini
进入编辑状态：
i
在[Zend]上面加上一下eAccelerator代码：
[eaccelerator]
zend_extension="/usr/local/lib/php/extensions/no-debug-non-zts-20060613/eaccelerator.so"
eaccelerator.shm_size="32"
eaccelerator.cache_dir="/tmp/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"
保存修改的文件，退出到SSH命令状态，重启apache
service httpd restart
查看下安装成功了没有：
php -v
安装成功eAccelerator了！