Ajustez votre code comme suit :
$sql = "select * from tbl where col2 LIKE ? or col2 LIKE ?";
$params = array($sID."%", $sUser."%");
$stmt = sqlsrv_query( $conn, $sql, $params);
Ajustez votre code comme suit :
$sql = "select * from tbl where col2 LIKE ? or col2 LIKE ?";
$params = array($sID."%", $sUser."%");
$stmt = sqlsrv_query( $conn, $sql, $params);