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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Mail
  * @subpackage Storage
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 
 /**
  * @category   Zend
  * @package    Zend_Mail
  * @subpackage Storage
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 
 interface Zend_Mail_Part_Interface extends RecursiveIterator
 {
     /**
      * Check if part is a multipart message
      *
      * @return bool if part is multipart
      */
     public function isMultipart();
 
 
     /**
      * Body of part
      *
      * If part is multipart the raw content of this part with all sub parts is returned
      *
      * @return string body
      * @throws Zend_Mail_Exception
      */
     public function getContent();
 
     /**
      * Return size of part
      *
      * @return int size
      */
     public function getSize();
 
     /**
      * Get part of multipart message
      *
      * @param  int $num number of part starting with 1 for first part
      * @return Zend_Mail_Part wanted part
      * @throws Zend_Mail_Exception
      */
     public function getPart($num);
 
     /**
      * Count parts of a multipart part
      *
      * @return int number of sub-parts
      */
     public function countParts();
 
 
     /**
      * Get all headers
      *
      * The returned headers are as saved internally. All names are lowercased. The value is a string or an array
      * if a header with the same name occurs more than once.
      *
      * @return array headers as array(name => value)
      */
     public function getHeaders();
 
     /**
      * Get a header in specificed format
      *
      * Internally headers that occur more than once are saved as array, all other as string. If $format
      * is set to string implode is used to concat the values (with Zend_Mime::LINEEND as delim).
      *
      * @param  string $name   name of header, matches case-insensitive, but camel-case is replaced with dashes
      * @param  string $format change type of return value to 'string' or 'array'
      * @return string|array value of header in wanted or internal format
      * @throws Zend_Mail_Exception
      */
     public function getHeader($name, $format = null);
 
     /**
      * Get a specific field from a header like content type or all fields as array
      *
      * If the header occurs more than once, only the value from the first header
      * is returned.
      *
      * Throws a Zend_Mail_Exception if the requested header does not exist. If
      * the specific header field does not exist, returns null.
      *
      * @param  string $name       name of header, like in getHeader()
      * @param  string $wantedPart the wanted part, default is first, if null an array with all parts is returned
      * @param  string $firstName  key name for the first part
      * @return string|array wanted part or all parts as array($firstName => firstPart, partname => value)
      * @throws Zend_Exception, Zend_Mail_Exception
      */
     public function getHeaderField($name, $wantedPart = 0, $firstName = 0);
 
 
     /**
      * Getter for mail headers - name is matched in lowercase
      *
      * This getter is short for Zend_Mail_Part::getHeader($name, 'string')
      *
      * @see Zend_Mail_Part::getHeader()
      *
      * @param  string $name header name
      * @return string value of header
      * @throws Zend_Mail_Exception
      */
     public function __get($name);
 
     /**
      * magic method to get content of part
      *
      * @return string content
      */
     public function __toString();
 }