Question

i.e.:

<form 1>
<input type="hidden" name="url" value="1">
</form 1>

and

<form 2>
<input type="hidden" name="url" value="2">
</form 2>

Is this allowed and valid?

Answer 1

Yes, it is valid

This is Good

<form name="form1">
  <input type="hidden" name="url" value="1">
</form>

<form name="form2">
  <input type="hidden" name="url" value="2">
</form>

This is also fine and will generally be interpreted as an array of values, e.g. {url: [1, 2]}, depending on what your server does. In a URL encoding, it will look like url=1&url=2.

<form name="form1">
  <input type="hidden" name="url" value="1">
  <input type="hidden" name="url" value="2">
</form>