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@ 2020-04-24T08:30:22Z

<?php

abstract class A {
    abstract public function test(A $foo): self;
}

class B extends A {
    public function test(A $foo): self
    {
        return $this;
    }
}

$foo = new B();
var_dump($foo, $foo->test($foo));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

34.16 ms | 404 KiB | 5 Q