Under Windoze, the printing extensions provided by PECL (http://pecl4win.php.net/index.php) can be installed into PHP to support printing to printers connected to or usable by the Web server. If the printing extensions are installed, the printers defined on the Web server will appear in the list of printers enumerated by the PHP printing extension functions.
The extension packages themselves are available at: http://snaps.php.net/.
If your version of PHP does not already include the extensions in the extensions/ or ext/ directory, select the appropriate PECL snaps repository for your version of PHP and obtain this unbundled PECL extension from it. Either put it in the extensions directory, the bin directory or the Apache bin directory.