Flexcode SDK : I want to search (globel search with single button) record on the basis of finger print impression without using any user_id

I am integrating flexcodeSDK with my application using php and mysql. I am trying to register a new record . As per the demo given, it is mandatory to pass the user id of user for whom i am adding the finger prints.

But in my application i am registering finger prints in the first step of registration (Add User) so there is no user ID. Now how do i handle this case?

Actually my requirement is that i want to search ( global search with single button ) record from database on the basis of perticular finger print.Please help. Here is my code

process_verification.php

<?php if (isset($_POST['VerPas']) && !empty($_POST['VerPas'])) {

include 'include/global.php';
include 'include/function.php';

$data       = explode(";",$_POST['VerPas']);
$user_id    = $data[0];
$vStamp     = $data[1];
$time       = $data[2];
$sn         = $data[3];

$fingerData = getUserFinger($user_id);
$device     = getDeviceBySn($sn);

$salt = md5($sn.$fingerData[0]['finger_data'].$device[0]['vc'].$time.$user_id.$device[0]['vkey']);

if (strtoupper($vStamp) == strtoupper($salt)) {

    $log = createLog($user_id, $time, $sn);

    if ($log == 1) {

        echo $base_path."messages.php?user_id=$user_id&time=$time";

    } else {

        echo $base_path."messages.php?msg=$log";

    }

} else {

    $msg = "Parameter invalid..";

    echo $base_path."messages.php?msg=$msg";

}

}

?>

process_register.php

<?php if (isset($_POST['RegTemp']) && !empty($_POST['RegTemp'])) {

    include 'include/global.php';
    include 'include/function.php';

    $data       = explode(";",$_POST['RegTemp']);
    $vStamp     = $data[0];
    $sn         = $data[1];
    $user_id    = $data[2];
    $regTemp    = $data[3];

    $device = getDeviceBySn($sn);

    $salt = md5($device[0]['ac'].$device[0]['vkey'].$regTemp.$sn.$user_id);

    if (strtoupper($vStamp) == strtoupper($salt)) {

        $sql1       = "SELECT MAX(finger_id) as fid FROM demo_finger WHERE user_id=".$user_id;
        $result1    = mysql_query($sql1);
        $data       = mysql_fetch_array($result1);
        $fid        = $data['fid'];

        if ($fid == 0) {
            $sq2        = "INSERT INTO demo_finger SET user_id='".$user_id."', finger_id=".($fid+1).", finger_data='".$regTemp."' ";
            $result2    = mysql_query($sq2);
            if ($result1 && $result2) {
                $res['result'] = true;              
            } else {
                $res['server'] = "Error insert registration data!";
            }
        } else {
            $res['result'] = false;
            $res['user_finger_'.$user_id] = "Template already exist.";
        }

        echo "empty";

    } else {

        $msg = "Parameter invalid..";

        echo $base_path."messages.php?msg=$msg";

    }

}

?>