Description:
------------
When the name assigned to a form field contains such characters as '.' or space(' '), the $_GET/$_POST[$name] will not catch the contents of the field using that same name, instead you have to substite '.' or ' ' with '_' in the $_GET/$_POST function.


Reproduce code:
---------------
<?php
$field = "text.field";
if(isset($_GET[$field]))
{
	echo $_GET[$field];
}
?>
<form method="get">
  <label>
  <input type="text" name="text.field" id="text field" value="WORKS"/>
  </label>

  <p>
    <label>
    <input type="submit" name="button" id="button" value="Submit" />
    </label>
  </p>
</form>

Expected result:
----------------
WORKS

Actual result:
--------------
nothing shows up, however changing $field = "text.field" to $field = "text_field" will display correct results.