Detailed explanation of how Symfony obtains request parameters in templates and behaviors

How does Symfony obtain request parameters in templates and behaviors? This article mainly introduces the method of obtaining request parameters in Symfony's behavior and templates, and analyzes Symfony's techniques for obtaining parameters in behaviors and methods with examples. Friends in need can refer to it. I hope it will be helpful to everyone.

1. Obtaining parameters from the template

getParameter('name','namespace');?>
getParameter('name');?>

2. Obtaining parameters from the behavior

$request->getParameter('name');
//模板中取得参数
get('name')?>
//带默认值的参数
get('name','default')?>
//在模板中判断一个参数是否存在
has('name')): ?>
Hello,get('name')?>!

Hello,JohnDoe!

//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

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