How to connect to sql server from php desktop

Question

My application run smoothly on wamp but when I tried to convert it to desktop application using phpdesktop, this error was displayed on the screen could not find driver

I have already done this in ini.php in phpdesktop folder

extension=php_pdo_sqlsrv_56_nts.dll
extension=php_pdo_sqlsrv_56_ts.dll
extension=php_sqlsrv_56_nts.dll
extension=php_sqlsrv_56_ts.dll

And I have copied the extensions to the ext folder