$email = $this->getRequest()->getPost('email');
$email = isset($_POST['email']) ? $_POST['email'] : null;
但你可以通过第二个参数来规定这个值:
$email = $this->getReques()->getPost('email',false )
验证客户端的请求方式:
$this->getRequest()->isPost();
返回: true /false