[php5.3.x 버전 이상에서는 zendoptimazer 대신 php 5.3.x 버전이면 ZendGuardLoader 를 설치하셔야 합니다.]

php 5.3.x 버전이면 ZendGuardLoader 를 설치하셔야 합니다
혹시 아파치를 --with-mpm-worker 옵션으로 설치하셨다면 ZendGuardLoader 가 아무리 php.ini에 올려도 올라오지 않습니다.
필히 아파치를 prefork 로 설치 했을 경우만 ZendGuardLoader 가 설치 됩니다.

linux 32비트용
http://downloads.zend.com/guard/5.5.0/ZendGuardLoader-php-5.3-linux-glibc23-i386.tar.gz

linux 64비트용
http://downloads.zend.com/guard/5.5.0/ZendGuardLoader-php-5.3-linux-glibc23-x86_64.tar.gz


# cd /usr/local/src/
# wget http://downloads.zend.com/guard/5.5.0/ZendGuardLoader-php-5.3-linux-glibc23-i386.tar.gz
# cd ZendGuardLoader-php-5.3-linux-glibc23-i386/php-5.3.x/
# cp ZendGuardLoader.so /usr/local/php/lib/php/extensions/no-debug-zts-20090626/

# vi /usr/local/php/php.ini

-------------------------------------------------------------------------------------------------
[Zend_Guard_Loader]
zend_extension=/usr/local/php/lib/php/extensions/no-debug-zts-20090626/ZendGuardLoader.so
zend_loader.enable=1
-------------------------------------------------------------------------------------------------

# /usr/local/apache/bin/apachectl restart
# /usr/local/php/bin/php -v

------------------------------------------------------------------------------------
PHP 5.3.10 (cli) (built: Apr 4 2012 15:02:50)
Copyright (c) 1997-2012 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies
with Zend Guard Loader v3.3, Copyright (c) 1998-2010, by Zend Technologies
------------------------------------------------------------------------------------