Unable to load Zend Optimizer when PHP_DBG extension is loaded

Applies To:

[ Zend Optimizer 3.3.x ]
[ All operating systems ]

Symptom

After you have installed one of Zend Products containing Zend Optimizer extension and you restart Apache for the first time, you might get the following error:
"Zend Optimizer: Unable to register functions, unable to load"

Technical Details

This is caused due to incompatibility between the Zend Optimizer extension and the php_dbg extension.

Resolution / Workaround

Please comment out the following directive from your php.ini:
extension=php_dbg.dll-[PHP VERSION]

Then, restart your web server to see is Zend Optimizer loads properly.

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Excerpt: After you have installed one of Zend Products containing Zend Optimizer extension and you restart Apache for the first time, you might get the following error: "Zend Optimizer: Unable to register functions, unable to load"

Original Post Date: 2009-04-13 12:04:08

Alternative Description:

Zend Optimizer and PHP_DBG extensions are incompatible

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Tags: Apple OS X 10.7 (Lion),Debian / Ubuntu,MacOS 10.6 and earlier,MS Windows 2003 Server,MS Windows 2008 Server,MS Windows 7,MS Windows XP,optimizer,php_dbg,RedHat Enterprise Linux / CentOS,register functions,SUSE Linux Enterprise Server / OpenSUSE,unable to load,Zend Guard,oldKB