Putting header into CSV file

Question

I have on a client’s page a log generation routine. However, I always need to add a header field on the first line. Here is the function code:

public function generateLogPMWeb($action){
    session_start('usuario');
    $logPMWeb  = $_SESSION['usuario']['id'] . ";" . $_SESSION['usuario']['id'] . "_" . $_POST['idHotel'] . "_" . date('YmdHis') . ";" . $_SESSION['usuario']['nome'] . ";" . $_SESSION['usuario']['sobrenome'] . ";" . $_SESSION['usuario']['email'] . ";" . "IC"
            . ";" . $_SESSION['usuario']['id'] . "_" . $_POST['idHotel'] . "_" . date('YmdHis') . ";" . $_POST['idHotel'] . ";" . date('Y-m-d H:i:s') . ";" . $_SESSION['buscaReserva']['dataInicio'] . ";" . $_SESSION['buscaReserva']['dataFim']
            . ";" . "Acao: " .  preg_replace('/^\s+|\n|\r|\s+$/m', '', $action) . ";\n";
    file_put_contents(Config::retorna("document_root", "root").'/logs/logPMWeb_'.date("Ymd").'.csv', $logPMWeb, FILE_APPEND);
}

I have looked on other sites the use of fputcsv function, but I do not know it serves for this case. is better to do?