PHP Manual 
With the SAP MaxDB PHP extension, you can access SAP MaxDB databases using PHP. The SAP MaxDB PHP extension is an interface between PHP and SAP MaxDB SQLDBC.
The SAP MaxDB PHP extension can be used on Linux (32 bit), Microsoft Windows 2000, and Microsoft Windows XP. You need PHP version 4.3.6 or higher.
Download
The SAP MaxDB PHP extension is not part of the SAP MaxDB standard installation package. You can download it from the PECL Repository for PHP extensions at http://pecl.php.net
More Information
You can find the SAP MaxDB PHP extension reference documentation at http://www.php.net/manual/en/ref.maxdb.php. This documentation is also available in docbookxml format at http://cvs.php.net/phpdoc/en/reference/maxdb.