I was getting this when using the SQL Anywhere php module for PHP 5.3.5 for Windows because it was compiled using VC9, while the WAMP installer I was using for testing was compiled with VC6.

I received this error in the Apache error log:

PHP Warning:  PHP Startup: sqlanywhere: 
Unable to initialize module\nModule compiled with 
build ID=API20090626,TS,VC9\nPHP    compiled with 
build ID=API20090626,TS,VC6\nThese options need to match\n in Unknown on line 0

I am not sure how to fix it other than somehow acquiring the correct php module compiled with VC6 instead of 9.

I ended up using the one from the Sybase website compiled with VC9 and IIS instead.

Note: I do not think it has anything to do with using Zend or not, It's just how the PHP was compiled vs how the SQLA module was compiled.

FYI: There are multiple builds for Apache httpd on Windows generally available, hence the VC6/VC9 confusion.

I am assuming that you have installed the original VC6 Apache Windows build (from http://httpd.apache.org/), and the VC6 build of PHP.

If you want to use the pre-compiled PHP SQL Anywhere module that ships with SQL Anywhere (which was compiled with VC9), you must use a VC9 build of Apache (you can find one at: http://www.apachelounge.com/download/ ) and a VC9 build of PHP ( http://windows.php.net/download/ ).

Alternatively, you can download the source code and re-compile the SQL Anywhere PHP extension in VC6: http://www.sybase.com/detail?id=1019698