Reverse Email

<?php
class Reverse
{

    private function save($saveas,$name)
    {
        $result = fopen($name, "a+");
        fwrite($result, "$saveas\n");
        fclose($result);
    }

    private function curl($mail)
    {
        $setopt = array(
            CURLOPT_URL             => 'https://osint.sh/reversewhois/',
            CURLOPT_RETURNTRANSFER  => true,
            CURLOPT_POST            => true,
            CURLOPT_POSTFIELDS      => "email=$mail",
            CURLOPT_USERAGENT       => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36',
            CURLOPT_CONNECTTIMEOUT  => 60,
            CURLOPT_TIMEOUT         => 60,
            CURLOPT_HEADER          => false
        );
        $ch = curl_init();
        curl_setopt_array($ch, $setopt);
        $exe = curl_exec($ch);
        curl_close($ch);
        return $exe;
    }

    public function email($email)
    {
        $lookup = $this->curl($email);
        $scrapt = preg_match_all("/<a href=\"https:\/\/(.*?)\">(.*?)<\/a>/i", $lookup, $domain);
        $url = preg_replace("/<i class=\"(.*?)\"><\/i>/", '', $domain[2]);
        $url = str_replace('Teguh Aprianto', '', $url);
        $filter = array_filter($url);
        if ($filter == null)
        {
            echo "No Result In This Email $email";
        }
        else
        {
            echo "Result :\n";
            foreach ($filter as $key)
            {
                echo "[+] $key\n";
                $this->save($key,'result.txt');
            }
        }
    }
}
$reverse = new Reverse;
$email = readline('Input Your Email (admin@admin.com) : ');
$reverse->email($email);
?>