Eponymous
Eponymous means that it carries the same name. For example, a variable called $variable, or a constant called CONSTANT.
PHP does not allow every structure to be eponymous. It is not possible to call a class class, but one may call a class anonymous: this won’t be eponymous, as an anonymous class doesn’t have a name.
<?php
const CONSTANT = 'literal';
$variable = CONSTANT;
?>