Online PHP editor | output for er2cU

<?php $alias_list = []; $alias_autoloader = function($class_name) use (&$alias_list) { if (isset($alias_list[strtolower($class_name)])) { class_alias($class_name, $alias_list[strtolower($class_name)]); return true; } }; $alias = function($from, $to) use (&$alias_list) { $alias_list[$to] = $from; }; spl_register_autoload($alias_autoloader); class Foo { function test() { return get_class_name($this); } } class BarCollision extends Foo { } $alias('Bar', 'Foo'); $alias('BarCollision', 'Foo'); $b = new Bar; $c = new BarCollision; var_dump($b->test(), $c->test());