<?php echo $sf_request->getParameter('name','namespace');?>
<?php echo $sf_request->getParameter('name');?>

$request->getParameter('name');
//模板中取得参数
<?php echo $sf_params->get('name')?>
//带默认值的参数
<?php echo $sf_params->get('name','default')?>
//在模板中判断一个参数是否存在
<?php if($sf_params->has('name')): ?>
<p>Hello,<?php echo $sf_params->get('name')?>!</p>
<?php else: ?>
<p>Hello,JohnDoe!</p>
<?php endif; ?>
//包含所有参数的数组
$request->getParameterHolder()->getAll()
//完整的URI路径
//'http://localhost/myapp_dev.php/mymodule/myaction'
getUri()
//'/mymodule/myaction'
getPathInfo()
//在action中
$hasFoo =$this->getRequest()->hasParameter('foo');
$hasFoo = $this->hasRequestParameter('foo');//Shorter version
$foo  =$this->getRequest()->getParameter('foo');
$foo  =$this->getRequestParameter('foo'); //Shorterversion