PHP that doesn't support 64-bit integer (no replies)

I need to use the PHP Dropbox API. I installed EasyPHP-DevServer-14.1VC9 and it works fine with all my code. But when I try to access the Dropbox API I get this error message:

Fatal error: Uncaught exception 'Exception' with message 'The Dropbox SDK uses 64-bit integers, but it looks like we're running on a version of PHP that doesn't support 64-bit integers (PHP_INT_MAX=2147483647). Library: "D:\EasyPHP-DevServer-14.1VC9\data\localweb\persport\dropbox-sdk\Dropbox\RequestUtil.php"' in D:\EasyPHP-DevServer-14.1VC9\data\localweb\persport\dropbox-sdk\Dropbox\RequestUtil.php:22 Stack trace: #0 D:\EasyPHP-DevServer-14.1VC9\data\localweb\persport\dropbox-sdk\Dropbox\autoload.php(27): require_once() #1 [internal function]: Dropbox\autoload('Dropbox\Request...') #2 D:\EasyPHP-DevServer-14.1VC9\data\localweb\persport\dropbox-sdk\Dropbox\WebAuthBase.php(11): spl_autoload_call('Dropbox\Request...') #3 D:\EasyPHP-DevServer-14.1VC9\data\localweb\persport\dropbox-sdk\Dropbox\WebAuthNoRedirect.php(56): Dropbox\WebAuthBase->_getAuthorizeUrl(NULL, NULL) #4 D:\EasyPHP-DevServer-14.1VC9\data\localweb\persport\dropbox2.php(17): Dropbox\WebAuthNoRedirect->start() #5 {main} thrown in D:\EasyPHP-DevServer-14.1VC9\data\localweb\persport\dropbox-sdk\Dropbox\RequestUtil.php on line 22

Is this error due to something I misconfigured? Or can't I simply use the Dropbox API in EasyPHP?

Thanks in advance for your help