/**
 * ポスト要求処理
 *
 * @return void
 */
function sendPost($url, $arrPost) {
    $req = new HTTP_Request($url);
    $req->setMethod(HTTP_REQUEST_METHOD_POST);

    // 電文の送付
    $req->addPostDataArray($arrPost);
    // 応答内容の取得
    $response = $req->sendRequest();

    $err_flg = false;
    if (!PEAR::isError($response)) {
        $response = $req->getResponseBody();
    } else {
        $mess = mb_convert_encoding($e->getMessage(), CHAR_CODE, "SJIS");
        $err_flg = true;
    }
    $req->clearPostData();

    if (!$err_flg) {
        $response = mb_convert_encoding($response, CHAR_CODE, "auto");
        $response = split("\n", $response);
        return $response;
    } else {
        return $mess;
    }
}