Hello,
The error message "Fatal error: Call to undefined method Locale::setApplicationLanguage() in ..../znetdk/index.php on line 55" is displayed when the PHP extension php_intl.dll is enabled in the php.ini configuration file.
This issue exists since the version 0.94 because the class \Locale is both declared in ZnetDK and in the Intl extension.
A workaround consists in commenting the line extension=php_intl.dll in the php.ini.
This problem will be fixed in version 0.97 of ZnetDK scheduled the 10/07/2015.
Thank you Mohamed for your feedback about this error.
Regards,