original_string: protected function _getHeaderClassName($header)
      {
          if (empty(self::$_handlers)) {
              $search = array(
                  'Horde_Mime_Headers_Element_Single',
                  'Horde_Mime_Headers_AddressesMulti',
                  'Horde_Mime_Headers_Addresses',
                  'Horde_Mime_Headers_ContentDescription',
                  'Horde_Mime_Headers_ContentId',
                  'Horde_Mime_Headers_ContentLanguage',
                  'Horde_Mime_Headers_ContentParam_ContentDisposition',
                  'Horde_Mime_Headers_ContentParam_ContentType',
                  'Horde_Mime_Headers_ContentTransferEncoding',
                  'Horde_Mime_Headers_Date',
                  'Horde_Mime_Headers_Identification',
                  'Horde_Mime_Headers_MessageId',
                  'Horde_Mime_Headers_Mime',
                  'Horde_Mime_Headers_MimeVersion',
                  'Horde_Mime_Headers_Received',
                  'Horde_Mime_Headers_Subject',
                  'Horde_Mime_Headers_UserAgent'
              );
  
              foreach ($search as $val) {
                  foreach ($val::getHandles() as $hdr) {
                      self::$_handlers[$hdr] = $val;
                  }
              }
          }
  
          $header = Horde_String::lower($header);
  
          return isset(self::$_handlers[$header])
              ? self::$_handlers[$header]
              : 'Horde_Mime_Headers_Element_Multiple';
      }
code: protected function _getHeaderClassName($header)
      {
          if (empty(self::$_handlers)) {
              $search = array(
                  'Horde_Mime_Headers_Element_Single',
                  'Horde_Mime_Headers_AddressesMulti',
                  'Horde_Mime_Headers_Addresses',
                  'Horde_Mime_Headers_ContentDescription',
                  'Horde_Mime_Headers_ContentId',
                  'Horde_Mime_Headers_ContentLanguage',
                  'Horde_Mime_Headers_ContentParam_ContentDisposition',
                  'Horde_Mime_Headers_ContentParam_ContentType',
                  'Horde_Mime_Headers_ContentTransferEncoding',
                  'Horde_Mime_Headers_Date',
                  'Horde_Mime_Headers_Identification',
                  'Horde_Mime_Headers_MessageId',
                  'Horde_Mime_Headers_Mime',
                  'Horde_Mime_Headers_MimeVersion',
                  'Horde_Mime_Headers_Received',
                  'Horde_Mime_Headers_Subject',
                  'Horde_Mime_Headers_UserAgent'
              );
  
              foreach ($search as $val) {
                  foreach ($val::getHandles() as $hdr) {
                      self::$_handlers[$hdr] = $val;
                  }
              }
          }
  
          $header = Horde_String::lower($header);
  
          return isset(self::$_handlers[$header])
              ? self::$_handlers[$header]
              : 'Horde_Mime_Headers_Element_Multiple';
      }
code_tokens: protected function _getHeaderClassName ( $ header ) { if ( empty ( self :: $ _handlers ) ) { $ search = array ( 'Horde_Mime_Headers_Element_Single' , 'Horde_Mime_Headers_AddressesMulti' , 'Horde_Mime_Headers_Addresses' , 'Horde_Mime_Headers_ContentDescription' , 'Horde_Mime_Headers_ContentId' , 'Horde_Mime_Headers_ContentLanguage' , 'Horde_Mime_Headers_ContentParam_ContentDisposition' , 'Horde_Mime_Headers_ContentParam_ContentType' , 'Horde_Mime_Headers_ContentTransferEncoding' , 'Horde_Mime_Headers_Date' , 'Horde_Mime_Headers_Identification' , 'Horde_Mime_Headers_MessageId' , 'Horde_Mime_Headers_Mime' , 'Horde_Mime_Headers_MimeVersion' , 'Horde_Mime_Headers_Received' , 'Horde_Mime_Headers_Subject' , 'Horde_Mime_Headers_UserAgent' ) ; foreach ( $ search as $ val ) { foreach ( $ val :: getHandles ( ) as $ hdr ) { self :: $ _handlers [ $ hdr ] = $ val ; } } } $ header = Horde_String :: lower ( $ header ) ; return isset ( self :: $ _handlers [ $ header ] ) ? self :: $ _handlers [ $ header ] : 'Horde_Mime_Headers_Element_Multiple' ; }
docstring: Return the header class to use for a header name.
  
  @param string $header  The header name.
  
  @return string  The Horde_Mime_Headers_* class to use.
docstring_tokens: Return the header class to use for a header name .