GoAhead Exploit - ZMAP List Filter

<?php

/*

*************************************
* GoAhead IP Camera  Exploit Filter *
*************************************
* THIS IS A PRIVATE FILE.           *
* YOU SHOULD NOT HAVE THIS.         *
* IF YOU LEAK THIS, AT LEAST LEAVE  *
* CREDIT TO THE AUTHOR IN THE       *
* COMMENTS BELOW.                   *
*************************************
* EXPLOIT FOUNDER:                  *
* * Pierre Kim                      *
*************************************
* SCRIPT AUTHOR:                    *
* * Jester                          *
* INSTAGRAM:                        *
* * thejesterino                    *
* TWITTER:                          *
* * @xJesterino                     *
* HACKFORUMS UID:                   *
* * 2978478                         *
*************************************
* * Backdoors removed!              *
*************************************
* * #OstrichGang                    *
* * #CanadianGang$                  *
* ***********************************

*/

$list = "poop.txt";
$port = "8081";
$output = "GoAhead-Filtered.txt";

function in_array_r($item, $array) {
    return preg_match('/"' . $item . '"/i', json_encode($array));
}

 file($list);
    ForEach ($file as $line) {
        $ip = $line;
        $ip = trim($ip);
        $url = 'http://' . $ip . ':' . $port;
        $ch = curl_init();
        $headers = [];
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_TIMEOUT, 1);
        // this function is called by curl for each header received
        curl_setopt($ch, CURLOPT_HEADERFUNCTION, function ($curl, $header) use (&$headers) {
            $len = strlen($header);
            $header = explode(':', $header, 2);
            if (count($header) < 2) // ignore invalid headers
            return $len;
            $name = strtolower(trim($header[0]));
            if (!array_key_exists($name, $headers)) $headers[$name] = [trim($header[1]) ];
            else $headers[$name][] = trim($header[1]);
            return $len;
        });
        $data = curl_exec($ch);
        if (in_array_r("GoAhead-Webs", $headers)) {
            echo "GoAhead Found";
            $data = $ip . ":" . $port . "";
            file_put_contents($output, $data, FILE_APPEND | LOCK_EX);
        } else {
            echo "Not A GoAhead Device or Dead....";
        }
    }

?>