only functions are separated with multiple namespaces in a file

multiple_namespaces_in_a_file.php

<?php

namespace A {
    $closure = function () {
        echo __NAMESPACE__;
    };
}

namespace B {
    $closure = function () {
        echo __NAMESPACE__;
    };
    $var = 'foo';
    function foo()
    {
        return 'foofunc()';
    }
}

namespace C {

    use function B\foo;

    $closure();
    echo '<br>';
    echo $var;
    echo '<br>';
    echo foo(); // only this require a use statement
}