Description:
------------
An invalid character error is raised when I want to set an attribute on 
a DomElement.

When I put my code in a try ... catch everything works fine

Reproduce code:
---------------
$doc = new DOMDocument('1.0', 'iso-8859-1');
$node = $doc->createElement('test');
$newnode = $doc->appendChild($node);
$newnode->setAttribute("name application", "MyApp");

Raises an error

$newnode->setAttribute("0001", "File");
Also raises an error
		

Expected result:
----------------
The attribute is set on my DomElement

Actual result:
--------------
'DOMException' with message 'Invalid Character Error'