How we can check the information sent to server in a client request?

What are the information sent to server in a client request?How can we check those informa开发者_开发问答tion? I mean can we view those information(Is there any way to check)?

The Net panel in Firebug is how i usually check both request and response for debugging.

you can get the value of the submission when you submit a form on a website by writing a script to be called when the form is submitted. For example, you've got a login form. The form consists of login and password fields.

This form makes a POST request to some location, defined in the form's action attribute:

<form action="myScript.php">

then, in your script, you would need to use the request object to retrieve elements from it and those will be the info that your user submitted.