- var_dump: documentation ( source)
- get_class_methods: documentation ( source)
<?php
function f(string $f){}
$f = new ReflectionFunction('f');
$param = $f->getParameters();
var_dump($param[0]);
var_dump(get_class($param[0]));
var_dump(get_class_methods($param[0]));
var_dump($param[0]->getTypeName());