<?php
namespace foo;
class Xyz {}
function abc () {}
?>
<?php
namespace bar;
class Xyz {}
function abc () {}
?>
<?php
namespace bar;
use foo|Xyz;
use foo|abc;
new Xyz(); // instantiates \foo\Xyz
new namespace|Xyz(); // instantiates \bar\Xyz
abc(); // invokes \bar\abc regardless of the second use statement
|foo|abc(); // it has to be invoked using the fully qualified name
?>