解压gzip数据流 和 file_get_contents()函数支持SSL错误和header

file_get_contents()函数的相关参数，支持SSL错误和header

$options = array(
    "ssl" => array(
        "verify_peer" => false,
        "verify_peer_name" => false,
    ),
	"http" => array(
        'timeout '=> 2,
	    'method' => "GET",
	    'header' => 
                    "Accept: application/json\r\n" .
                    "Accept-Encoding: gzip, deflate\r\n" .
                    "Accept-Language: zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3\r\n" .
                    // "Connection: keep-alive\r\n" .
                    "Cookie: foo=bar\r\n" .
                    "Host: www.jb51.net\r\n" .
                    "Referer: http://www.baidu.com\r\n" .
                    "User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:21.0) Gecko/20100101 Firefox/21.0\r\n" .
                    "X-Requested-With: XMLHttpRequest",

    ),
);
$f = file_get_contents("http://www.jb51.net", false, stream_context_create($options));

echo gzdecode($f);

if(!function_exists('gzdecode')){
    function gzdecode($data){
        $flags = ord(substr($data, 3, 1));
        $headerlen = 10;
        $extralen = 0;
        $filenamelen = 0;
        if($flags & 4){
            $extralen = unpack('v', substr($data, 10, 2));
            $extralen = $extralen[1];
            $headerlen += 2 + $extralen;
        }
        if($flags & 8)  // Filename
            $headerlen = strpos($data, chr(0), $headerlen) + 1;
        if($flags & 16)  // Comment
            $headerlen = strpos($data, chr(0), $headerlen) + 1;
        if($flags & 2)  // CRCatendoffile
            $headerlen += 2;
        $unpacked = @gzinflate(substr($data, $headerlen));
        if($unpacked === FALSE)
            $unpacked = $data;
        return $unpacked;
    }
}