抓取源码 - php抓取网页源码的问题

<code><?php

header ( "Content-type: text/html; charset=utf-8" );

$url = "http://183.36.249.82/";

$contents = file_get_contents($url);

echo $contents;

?>

</code>

<code><?php

header ( "Content-type: text/html; charset=utf-8" );

$url = "http://183.36.249.82/";

$contents = file_get_contents($url);

echo $contents;

?>

</code>

<code class="lang-php"><?php

$header = <<<HEADER

Connection: keep-alive

Cache-Control: max-age=0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8

User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.116 Safari/537.36

DNT: 1

Referer: http://183.36.249.82/

Accept-Encoding: gzip,deflate,sdch

Accept-Language: zh-CN,zh;q=0.8

HEADER;

$context = stream_context_create(array(

    'http' => array(

        'method' => 'GET',

        'header' => $header,

        'timeout' => 10,

        'protocol_version' => '1.1',

    ),

));

$contents = file_get_contents('http://183.36.249.82/', false, $context);

echo $contents;

</code>