<?php

$fname = 'Černý';
$lname = 'Kolo';
$email = 'div.x@seznam.cz';
$phone = '+421800123456';

$test = new Newsletter($fname, $lname, $email, $phone);
$test->send();

var_dump($test->getResult());


final class Newsletter
{
    private $fname;
    private $lname;
    private $email;
    private $phone;
    private $json;

    public function __construct($fname, $lname, $email, $phone)
    {
        $this->fname = urlencode($fname);
        $this->lname = urlencode($lname);
        $this->email = urlencode($email);
        $this->phone = urlencode($phone);
    }

    public function send()
    {
        $url = "https://is.businessbooster-crm.com/marketing/newsletters/10000068/snippet_registrations/create?callback=jQuery18207048461027443409_1416952044779&utf8=%E2%9C%93&authenticity_token=6l6uM75Ha9FJ0KEkskk%2B6kfzCmjkwSGLzPAsqHGvGl4%3D&newsletter_registration%5Breference_source_id%5D=1270&newsletter_registration%5Blayout%5D=2&newsletter_registration%5Bname%5D=$this->fname&newsletter_registration%5Bsurname%5D=$this->lname&newsletter_registration%5Bemail%5D=$this->email&newsletter_registration%5Bphone%5D=$this->phone&newsletter_registration%5Bcaptcha%5D=&_=1416952082250";
        $this->json = file_get_contents($url);
    }

    public function getResult()
    {
        return $this->json;
    }
}