/**
  * Constructor. Generates unique boundary ID using microtime.
  */
 public function __construct()
 {
     parent::__construct();
     $this->_boundary = sprintf('%x', crc32(uniqid(null, true)));
 }
 /**
  * Constructor. Generates unique boundary ID using microtime.
  */
 public function __construct()
 {
     parent::__construct();
     $this->_boundary = sprintf('%x', crc32(microtime()));
 }