<?php 
// https://twitter.com/the_paTiku/status/1276075890812878848

require 'vendor/autoload.php';

use GuzzleHttp\Client;
use GuzzleHttp\Exception\RequestException;
use GuzzleHttp\Psr7\Request;

use DiDom\Document;
use DiDom\Query;

$client = new \GuzzleHttp\Client();

$base = 'https://resellers.tp-partner.pl';
$url = $base . '/?action=sklepy&cmd=getCity&pr=zachodniopomorskie';

$response = $client->request('GET', $url);
$html = (string) $response->getBody();
$document = new Document($html);
$links = $document->find('.miasta > li > a::attr(href)');

foreach($links as $link) {
    $url = $base . $link;
    $response = $client->request('GET', $url);
    $html = (string) $response->getBody();
    $document = new Document($html);
    $emails = $document->find('.email > a::attr(href)');

    if (!empty($emails)) {
        echo str_replace("mailto:", "", $emails[0]) . "\n";
    }    
}