Description:
------------
When using the get_class() function on an object whose class is defined in a different namespace as the actual, the return value does not contain a leading backslah (which is normal). But then why are we able to dynamically create an instance, based on the result of get_class(), without adding a leading backslash?

I don't know if this is a bug, a feature, a wanted or un-wanted behavior, but I think this is weird.

Reproduce code:
---------------
<?php

namespace Foo;

class Test
{}

namespace Bar;

# Calling 'new Foo\Test()' will obvisously fail, as it won't be found in the current NS
$TEST      = new \Foo\Test(); 

$CLASSNAME = get_class( $TEST );

# Will display 'Foo\Test' - No leading backslash
print $CLASSNAME . '<br />';

# This will work... Why???
print_r( new $CLASSNAME() );

Expected result:
----------------
Foo\Test
Fatal error: Class 'Bar\Foo\Test' not found ... on line 19

Actual result:
--------------
Foo\Test
Foo\Test Object ( )