Proxy Crawler + Auto Check + Auto Save Live Proxy

<?php
/*
 * Coded By VanGans
 *
 * Proxy Crawler + Auto Check + Auto Save Live Proxy
 */

class Proxy {
    private $response;
    private $proxy;

    function ambilProxy() {
        echo '#> Mengambil proxy...' . PHP_EOL;
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, 'https://free-proxy-list.net/');
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $resp = curl_exec($ch);
        curl_close($ch);
        $this->response = $resp;
        return $this;
    }

    function satukan() {
        preg_match_all('/<tr><td>([0-9.]+)<\/td><td>([0-9]+)<\/td>/', $this->response, $result);
        $this->proxy = array_combine($result[1], $result[2]);
        return $this;
    }

    function checkProxy($timeout = 10) {
        $i = 0;
        foreach($this->proxy as $ip => $port) {
            echo "\e[44m#> Memeriksa proxy: ".$ip.':'.$port."\e[49m (".$i." of ".count($this->proxy).") | \e[4mCreated by rafinetiz\e[0m\r";
            if($con = @fsockopen($ip, $port, $errno, $error, 10)) {
                echo "\033[K#> \e[32mLive\e[0m => ". $ip .':'. $port . PHP_EOL;
                file_put_contents('proxy.txt', $ip.':'.$port.PHP_EOL, FILE_APPEND);
            } else {
                echo "\033[K#> \e[31mDie\e[0m  => ". $ip .':'. $port . ' | ' . $error . PHP_EOL;
            }
            $i++;
        }
    }
}

$crawler = new Proxy();
$crawler->ambilProxy()->satukan()->checkProxy();