How to format a curl command for a special task?

Question

There is a search page in a form http://site.com/search.php and it sends a search query via POST request. I want to fetch this request via curl command line tool to inspect a POST request.

The HTML form looks like this:

<form action="search.php" method="POST">
   <input type="text" name="search" size=20><br>
   SZ<input type="checkbox" checked name="sz">
   NZ<input type="checkbox" checked name="nz">
   <input type="submit" name="search_term" value="search" >
</form>

How should my curl command look like?

Answer 1

As an example, to send a search of "foo" with sz checked and nz unchecked:

curl -d "search_term=search&search=foo&sz=on&nz=off" http://site.com/search.php