reflection_bc.php

<?php

class A
{
    public $prop;

    public function __construct()
    {
        $this->prop = 'prop';
    }

    public function method()
    {
        return 'method';
    }
}

class B extends A
{
}

print_r((new ReflectionMethod(B::class, 'method'))->invoke(new A()).PHP_EOL);
print_r((new ReflectionProperty(B::class, 'prop'))->getValue(new A()).PHP_EOL);

Relates to: https://bugs.php.net/bug.php?id=75231