$form:fields
Such a construction returns hash with all form fields. Hash keys' names are the same as the names of form fields. Hash keys' values are the form fields' values.
Example ^form:fields.foreach[field;value]{
$field - $value
}[<br />]
…will output all form fields' names and their values.
Assume, requested URI is…
www.mysite.com/testing/index.html?name=worst&grade=F
Then the example will output: