I installed the wampserver 2.5 version.
I need use the php extension of pinter.dll on php 5.5.12 to send infomration to thermal printer.
But when I download the extension from:
https://windows.php.net/downloads/pecl/snaps/printer/0.1.0-dev/php_printer-0.1.0-dev-5.5-ts-vc11-x86.zip
and put in it to PHP "ext" folder and add the "printer.default_printer=PHP_INI_ALL
extension=php_printer.dll" into  php.ini and then restart server, It still does not work. 
Cannot find it on phpinfo, can't use "function printer_open()".
Any solutions are really appreciated.