How should I create my GUID?

Question

I\'m going to be uploading images to a system and need them to be referenced by a non-sequential unique ID. I\'ve read a little about GUIDs, and I\'m wondering what the best app

Answer 1

I also want to create guid for calling .net api and this function generate a key in guid format and it works for me

function generateGuid($include_braces = false) {
    if (function_exists('com_create_guid')) {
        if ($include_braces === true) {
            return com_create_guid();
        } else {
            return substr(com_create_guid(), 1, 36);
        }
    } else {
        mt_srand((double) microtime() * 10000);
        $charid = strtoupper(md5(uniqid(rand(), true)));

        $guid = substr($charid,  0, 8) . '-' .
                substr($charid,  8, 4) . '-' .
                substr($charid, 12, 4) . '-' .
                substr($charid, 16, 4) . '-' .
                substr($charid, 20, 12);

        if ($include_braces) {
            $guid = '{' . $guid . '}';
        }

        return $guid;
    }
}