как получить PHPSESSID при пользовании file_get_content?

php работает?

# получить миме тип файла
function getMimeType($filename) **
  if(function_exists('finfo_open')) **
    $finfo = finfo_open(FILEINFO_MIME_TYPE);
    $mime = finfo_file($finfo, $filename);
    finfo_close($finfo);
    return $mime;
  **
  return 'application/octet-stream';
**
# получить контент для запроса
function getContent($postData, $files) **
  $boundary = md5(rand(0,32000));
  $content = '';
  foreach($postData as $key => $val) ** 
    $content .= '--' . $boundary . "\n"; 
    $content .= 'Content-Disposition: form-data; name="' . $key . '"' . "\n\n" . $val . "\n"; 
  **
  foreach($files as $key => $file) ** 
    $content .= '--' . $boundary . "\n"; 
    $content .= 'Content-Disposition: form-data; name="' . $key . '"; filename="' . basename($file) . '"' . "\n"; 
    $content .= 'Content-Type: ' . getMimeType($file) . "\n"; 
    $content .= 'Content-Transfer-Encoding: binary' . "\n\n"; 
    $content .= file_get_contents($file) . "\n"; 
  **
  $content .= "--$boundary--\n";
  return array($boundary, $content);
**

function post_exec($url_, $post_, $files_, $cookies_) **

  if(!is_array($post_)) return(array("Данные post вне массива",""));
  if(!is_array($files_)) return(array("Данные files вне массива",""));
  list($boundary_, $content_) = getContent($post_, $files_);
  if(!empty($cookies_)) **
      $opts_ = stream_context_create(array(
			'http'=>array(
			'method'=>"POST",
			'header'=>"Content-Type: multipart/form-data; boundary=$boundary_\r\n".
			"User-Agent : Opera/9.80 (X11; Linux i686; U; ru) Presto/2.7.62 Version/11.00 \r\n".
			"Accept-Language: ru-RU,ru;q=0.9,en;q=0.8 \r\n".
			"Accept-Charset:utf-8, utf-16, *;q=0.1 \r\n".
			"Accept-Encoding:identity, *;q=0 \r\n".
      "Cookie: ".$cookies_,
			'content' => $content_
			)));
  ** else **
      $opts_ = stream_context_create(array(
			'http'=>array(
			'method'=>"POST",
			'header'=>"Content-Type: multipart/form-data; boundary=$boundary_\r\n".
			"User-Agent : Opera/9.80 (X11; Linux i686; U; ru) Presto/2.7.62 Version/11.00 \r\n".
			"Accept-Language: ru-RU,ru;q=0.9,en;q=0.8 \r\n".
			"Accept-Charset:utf-8, utf-16, *;q=0.1 \r\n".
			"Accept-Encoding:identity, *;q=0 \r\n",
			'content' => $content_
			)));  
  **
 $responce_ = file_get_contents($url_, false, $opts_);
  #сохраним cookies для передачи в последующих запросах 
 if(empty($cookies_)) **
		 $cookies_ = Array();
		 foreach( $http_response_header as $head_)**
		 if(stristr($head_, 'Set-Cookie:' )) $cookies_[] = (str_ireplace('Set-Cookie:', '', $head_ ));
		 **
		 $cookies_ = implode('; ',$cookies_);
  **
 #вернем результат и cookies
 return array($responce_, $cookies_);
**

$post = array(
'input1_name' => "val1",
'input2_name' => "val2",
);
$files = array(
"csvFile" => "/path/to/file/or/url"
);
list($result, $cookies) = post_exec("http://$username:$password@$hostname/url.php", $post, $files, $cookies);