Crazy feature I discovered in PHP. You can access protected properties of a instance if the method that's accessing those protected propteries exist on the same type of that instance, even if it's not the instance you are accessing from. Seems similar to C# nested types: https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-an…

Result.md

HasProtectedProperty

string(6) "foobar"

HasPrivateProperty

string(6) "barfoo"

WhyOnEarthDoesThisWork.php

<?php

class HasProtectedProperty {
    protected $myProtectedProperty;

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

    public function getProtectedProperty(HasProtectedProperty $hasProtectedProperty)
    {
        return $hasProtectedProperty->myProtectedProperty;
    }
}

$newProtectedProperty = new HasProtectedProperty();
$readProtectedProperty = new HasProtectedProperty();

var_dump($readProtectedProperty->getProtectedProperty($newProtectedProperty));

class HasPrivateProperty {
    private $myPrivateProperty;

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

    public function getPrivateProperty(HasPrivateProperty $hasPrivateProperty)
    {
        return $hasPrivateProperty->myPrivateProperty;
    }
}

$newPrivateProperty = new HasPrivateProperty();
$readPrivateProperty = new HasPrivateProperty();

var_dump($readPrivateProperty->getPrivateProperty($newPrivateProperty));