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@ 2023-07-25T02:26:14Z

<?php

interface I{}
class Data implements I{}

abstract class P
{
    public function getThing(): ?I
    {
        return null;
    }
}

class C extends P {
    public function getThing(): Data
    {
        return new Data;
    }
}

var_dump((new C)->getThing());

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

33.06 ms | 404 KiB | 5 Q