curl - PHPとcurlでipbボードにログインする必要があります

Question

CURLとPHPでIPボードにログインしようとしています。これは私が使用しているコードです。誰にもアイデアがありますか？

<?php

    $url=stream_get_contents(fopen('https://invisioncommunity.com/login/', "rb"));

    function get_string_between($string, $start, $end){
        $string = ' ' . $string;
        $ini = strpos($string, $start);
        if ($ini == 0) return '';
        $ini += strlen($start);
        $len = strpos($string, $end, $ini) - $ini;
        return substr($string, $ini, $len);
    }

    $csrf_key = get_string_between($url, '" value="', '">');

    $path = "/root/ctemp";

    $postinfo = "csrfKey=".$csrf_key."&auth=____USERNAME_______&password=___PASSWORD____&remember_me=1&_processLogin=usernamepassword&_processLogin=usernamepassword";
    $cookie_file_path = $path."/cookie.txt";

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_HEADER, false);
    curl_setopt($ch, CURLOPT_NOBODY, false);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);

    curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file_path);
    //set the cookie the site has for certain features, this is optional
    curl_setopt($ch, CURLOPT_COOKIE, "cookiename=0");
    curl_setopt($ch, CURLOPT_USERAGENT,
        "Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7");
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_REFERER, "https://invisioncommunity.com/login/");
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 0);

    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $postinfo);
    curl_exec($ch);

    //page with the content I want to grab
    curl_setopt($ch, CURLOPT_URL, "https://invisioncommunity.com/discover/unread/");

    //do stuff with the info with DomDocument() etc
    $html = curl_exec($ch);

    echo $html;

    curl_close($ch);
    ?>