- var_dump: documentation ( source)
<?php
function foo($bar, $baz) { return [$bar, $baz]; }
function userland_call_user_func(callable $function, ...$args) { return $function(...$args); }
var_dump(userland_call_user_func('foo', 'bar', 'baz'));
var_dump(call_user_func('foo', 'bar', 'baz'));