php-8.0.30-src/Zend/tests/indirect_reference_this.phpt

--TEST--
Indirect referenced $this
--FILE--
<?php
class X {
  function f($x){var_dump($$x);}
}
$x = new X;
$x->f("this");
?>
--EXPECTF--
object(X)#%d (0) {
}