I am doing this:
<form action="processform.php" type="post">
<input type="text" name="sample">
<input type="text" name="how">
<input type="checkbox" name="fields" value="fields">Something</input>
</form>
When the submit button is hit, this is what shows in the address bar of the process page:
https://www.domain.com/processform.php?sample=&how=&fields=
Change to
<form method="post" />