ipv4 scanner

ipv4_scanner.php

<?php

declare(strict_types=1);
$ip_range_start = 0;
$ip_range_start = ip2long("0.5.0.0");
$ip_range_end = 0xFFFFFFFF;
if (0) {
    $ip_range_start = ip2long("45.62.204.200");
    $ip_range_end = ip2long("45.62.204.230");
}
$worker_count = min(10_000, $ip_range_end - $ip_range_start);
$mh = curl_multi_init();
$unemployed_workers = array();
$employed_workers = array();
for ($i = 0; $i < $worker_count; ++$i) {
    $worker = curl_init();
    curl_setopt_array($worker, array(
        CURLOPT_RETURNTRANSFER => 1,
        CURLOPT_ENCODING => 1,
        CURLOPT_VERBOSE => 0
    ));
    $unemployed_workers[] = $worker;
}
$work = function () use (&$unemployed_workers, &$employed_workers, &$mh): void {
    static $fuk = 0;
    for (;;) {
        curl_multi_exec($mh, $active);
        if ($active < count($employed_workers)) {
            break;
        }
        curl_multi_select($mh);
    }
    while ($info = curl_multi_info_read($mh)) {
        if ($info['msg'] !== \CURLMSG_DONE) {
            continue;
        }
        $worker = $info['handle'];
        echo ".";
        ++$fuk;
        if ($fuk === 10000) {
            var_dump(curl_getinfo($worker, CURLINFO_EFFECTIVE_URL));
            $fuk = 0;
        }
        $html = curl_multi_getcontent($worker);
        if (
            // false !== stripos($html,"nginx") || 
            false !== stripos($html, "TibiaFun")
        ) {
            echo "found: " . curl_getinfo($worker, CURLINFO_EFFECTIVE_URL) . "\n";
            die();
        }
        //var_dump($html);
        curl_multi_remove_handle($mh, $worker);
        unset($employed_workers[(int)$worker]);
        $unemployed_workers[] = $worker;
    }
};
for ($ip = $ip_range_start; $ip <= $ip_range_end; ++$ip) {
    while (empty($unemployed_workers)) {
        $work();
    }
    $worker = array_pop($unemployed_workers);
    $url = "http://" . long2ip($ip) . "/";
    curl_setopt($worker, CURLOPT_URL, $url);
    // curl_setopt($worker,CURLOPT_PRIVATE, $url);
    curl_multi_add_handle($mh, $worker);
    $employed_workers[(int)$worker] = $worker;
}
while (count($employed_workers) > 0) {
    $work();
}