東京電力 TEPCO 毎月のWeb検針票をプログラムで取得

<?php

$listUrl = "https://www.kenshin.tepco.co.jp";
list($h, $b) = downloadPage($listUrl, "");
if (!empty($b)) {

    $csrfString = explode('<input type="hidden" name="_csrf" value="', $b);
    $csrfString = explode('"/>', $csrfString[1]);
    $csrfString = $csrfString[0];

    $query = "_csrf=$csrfString";

    $listUrl = "https://www.kenshin.tepco.co.jp";
    list($h, $b) = downloadPage($listUrl, $query);
    if (!empty($b)) {


        $query = "_csrf=$csrfString";

        //ここはブラウザーから取ります
        $query.= "&options=1&firstName=姓lastName=名companyName=&departmentName=&zipCode1=110&zipCode2=0001&prefectureCode=13&prefectureName=東京都cityCode=211&city=新宿address1Code=010&address1=住所1address2Code=003&address2=住所2addressBanchi=2&addressGou=1&addressRoomNm=202&customerCdSelect=0&visitNumber1=01000&visitNumber2=02000&visitNumber3=1&visitNumber4=01&officeCode=001&others=1&phoneNumber1=03&phoneNumber2=6555&phoneNumber3=4454&inquiryButton=";

        $listUrl = "https://www.kenshin.tepco.co.jp/identification";
        list($h, $b) = downloadPage($listUrl, $query);
        if (!empty($b)) {

            //ここです
            echo $b;
        }
    }
}

function downloadPage($url, $query)
{
    $resp = "";
    $curl = curl_init();

    $params = array(
        CURLOPT_RETURNTRANSFER => 1,
        CURLOPT_URL => $url,
        CURLOPT_SSL_VERIFYPEER => false,
        CURLOPT_SSL_VERIFYHOST => false,
        CURLOPT_COOKIEFILE => './cookiePath.txt',
        CURLOPT_COOKIEJAR => './cookiePath.txt',
        CURLOPT_FOLLOWLOCATION => 1,
        CURLOPT_USERAGENT => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:90.0) Gecko/20100101 Firefox/90.0',
        CURLOPT_VERBOSE => 0,
        CURLOPT_HEADER => 1,
    );

    if (!empty($query)) {
        $params[CURLOPT_POST] = 1;
        $params[CURLOPT_POSTFIELDS] = $query;
    }

    curl_setopt_array($curl, $params);
    $resp = curl_exec($curl);

    $header_size = curl_getinfo($curl, CURLINFO_HEADER_SIZE);
    $header = substr($resp, 0, $header_size);
    $body = substr($resp, $header_size);

    curl_close($curl);
    return array($header, $body);
}