Hjælp til søge funktion

if (isset($_GET['q'])) {

$searchTerms = explode(' ', $_GET['q']);

$searchTermBits = array();
$params = array();

foreach ($searchTerms as $term) {

    $term = trim($term);

    if (!empty($term)) {

        $searchTermBits[] = "Firstname LIKE ? OR Surname LIKE ?";
        $params[] = "%" . $term . "%, %" . $term . "%";
    }

}

$sql = 'SELECT Firstname, Surname FROM Person WHERE ' . implode(' OR ', $searchTermBits);

$options =  array( "Scrollable" => SQLSRV_CURSOR_KEYSET );
$stmt = sqlsrv_query( $conn, $sql, $params, $options);

$array = array();

while($fetch = sqlsrv_fetch_array($stmt, SQLSRV_FETCH_ASSOC))
    {
        $array[] = array('Name' => $fetch['Firstname'] . ' ' . $fetch['Surname']);
    }     
echo json_encode($array);
sqlsrv_free_stmt($stmt);

}