Installing or upgrading the Zend Optimizer pretty easy. Most of the install issues that people have is due to uploading the unzipped files to the server via FTP. This causes some files to not be uploaded as binary and results in errors like ERROR: Executable file: ./php doesn't exist in ./zui_files. It is VERY important that you upload the compressed packaged and unzip it on the server.


1. Download the Zend Optimizer.

2. Upload the gzip file to your server. Place it in a temp directory.

3. Login to your server via the console or ssh.

4. Unpack the compressed file.
# tar xvfz ZendOptimizer-3.3.3-linux-glibc23-i386.tar.gz

5. Change the permissions on the zend directory and install.sh file.
# chmod 777 ZendOptimizer-3.3.3-linux-glibc23-i386
# cd ZendOptimizer-3.3.3-linux-glibc23-i386
# chmod a+x install.sh

5. Run the install script. During the install you should be ok to take all the default options.
# ./install.sh

6. Copy all the [Zend] options from the bottom of php.ini and then delete them from the file.
# vim /etc/php.ini

7. Replace the [Zend] optins in the zend.ini file with the next version option.
# vim /etc/php.d/zend.ini

8. Restart the web server.
# services httpd restart


At this point the new version of the Zend Optimizer should be working as expected. You can check by doing a php --version or looking at phpinfo().

# php version
[root ~]# php --version
PHP 5.2.9 (cli) (built: Mar 10 2009 16:30:52)
Copyright (c) 1997-2009 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2009 Zend Technologies
    with Zend Extension Manager v1.2.2, Copyright (c) 2003-2007, by Zend Technologies
    with Zend Optimizer v3.3.3, Copyright (c) 1998-2007, by Zend Technologies


If you run into problems the Zend Forums is a good place to look for help. Granted, I did not find this info there, or anywhere for that matter so I hope it helps the next person that has issues installing Zend.