PHP版本 D-Link 动态域名客户端

<?php
/*
 * D-Link 动态域名客户端.主域名www.dlinkddns.com 和 www.dlinkddns.com.cn
 * 首先获取外网IP，若IP没有变化，则结束运行；否则更行域名的IP，若执行错误，则发送EMAIL.
 * 用到了 CURL 扩展
 * 2013.5.28
*/
// 获取外网 IP
$ipurl        = 'http://iframe.ip138.com/ic.asp';
$ip           = get_onlineip($ipurl);
//$ip = '14.134.204.99';
$iplog        = dirname(__FILE__) . '\ip.txt';
// 域名账号设定
$domain       = 'dlinkddns.com.cn';
$host         = 'lpszy';
$user         = 'tom112';
$pw           = 'PASSWORD';
// 邮件账号设定
$smtp = array(
    'url'      => 'smtp.sina.com',           //发件箱服务器
    'port'     => '25',
    'username' => 'safeboat@sina.com',       //发件箱账号
    'password' => 'PASSWORD',                 //发件箱密码
    'from'     => 'safeboat@sina.com',
    'to'       => '395636344@qq.com',        //接收信箱
    'subject'  => '请更新 '.$host.'.'.$domain.' 的IP',
    'body'     => $ip,
    );  

if(file_exists($iplog) == false) file_put_contents($iplog, '');
$oldip = file_get_contents($iplog);
if($oldip == $ip){
    echo "IP 没有变化";
    exit();
    }  

file_put_contents($iplog, $ip);
$cookie_file = dirname(__FILE__) . "/cookie_" . md5(basename(__FILE__)) . ".txt";
vlogin('http://www.'.$domain.'/login', 'username=' . $user . '&pw=' . $pw);
$response_body = vlogin('http://www.'.$domain.'/host/'.$host.'.'.$domain, 'modify='.$host.'&host='.$host.'&domain='.$domain.'&ip='.$ip.'&commit=%E4%BF%9D+++%E5%AD%98');
header("Content-type: text/html; charset=gb2312");
if(stristr($response_body, 'updated')){
    @unlink($cookie_file);
    echo "域名IP已更新.";
    exit();
    }  

@unlink($cookie_file);
echo "提交的账号、域名或IP错误，或者是服务器更新了参数等原因。\r\n";
echo '<br>稍后将发送IP到你的邮箱，请手动更新<br><br> ';
echo '一下是发邮件过程：<br>';
echo '<pre>' . smtp($smtp) . '</pre>';  

//下面为函数部分  

function get_onlineip($ipurl){
     $ch = curl_init($ipurl);
     curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
     $a = curl_exec($ch);
     preg_match('/\[(.*)\]/', $a, $ip);
     return @$ip[1];
     }
function vlogin($url, $data){
     $curl = curl_init();
     curl_setopt($curl, CURLOPT_URL, $url);
     curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
     curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 1);
     curl_setopt($curl, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
     curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
     curl_setopt($curl, CURLOPT_AUTOREFERER, 1);
     curl_setopt($curl, CURLOPT_POST, 1);
     curl_setopt($curl, CURLOPT_POSTFIELDS, @$data);
     curl_setopt($curl, CURLOPT_COOKIEJAR, $GLOBALS['cookie_file']);
     curl_setopt($curl, CURLOPT_COOKIEFILE, $GLOBALS['cookie_file']);
     curl_setopt($curl, CURLOPT_TIMEOUT, 30);
     curl_setopt($curl, CURLOPT_HEADER, 0);
     curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
     $tmpInfo = curl_exec($curl);
     if (curl_errno($curl)){
         echo 'Errno' . curl_error($curl);
         }
     curl_close($curl);
     return $tmpInfo;
    }
function smtp($smtp){
    $CRLF = "\r\n";
    $header = array(
        'Return-path' => '<' . $smtp['from'] . '>',
        'Date' => date('r'),
        'From' => '<' . $smtp['from'] . '>',
        'MIME-Version' => '1.0',
        'Subject' => trim($smtp['subject']),
        'To' => $smtp['to'],
        'Content-Type' => 'text/plain; charset=gb2312',
        'Content-Transfer-Encoding' => 'base64'
        );
    $ret = '';
    foreach($header as $k => $v){
        $ret .= $k . ': ' . $v . "\n";
        }
    $data = $ret . $CRLF . chunk_split(base64_encode($smtp['body']));
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $smtp['url']);
    curl_setopt($curl, CURLOPT_PORT, $smtp['port']);
    curl_setopt($curl, CURLOPT_TIMEOUT, 10);
    $content = "EHLO " . $smtp["url"] . $CRLF;
    $content .= "AUTH LOGIN" . $CRLF . base64_encode($smtp["username"]) . $CRLF . base64_encode($smtp["password"]) . $CRLF;
    $content .= "MAIL FROM:" . $smtp["from"] . $CRLF;
    $content .= "RCPT TO:" . $smtp["to"] . $CRLF;
    $content .= "DATA" . $CRLF . $data . $CRLF . "." . $CRLF;
    $content .= "QUIT" . $CRLF;
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_CUSTOMREQUEST, $content);
    curl_exec($curl);
    curl_close($curl);
    return $content;
    }  

?>