Invade PHP class easily (no dependancy)

helpers.php

<?php

if (!function_exists('invade')) :

    /**
     * Invade a class to access its private methods and properties.
     */
    function invade($target): InvadeProxy
    {
        return new InvadeProxy($target);
    }

endif;

InvadeProxy.php

<?php

namespace App;

class InvadeProxy
{
    public function __construct(
        public $target,
    ) {}

    public function __call($method, $args)
    {
        $fn = fn ($method, $args) => $this->{$method}(...$args);

        return $fn->call($this->target, $method, $args);
    }

    public function __get($property)
    {
        $fn = fn ($property) => $this->{$property};

        return $fn->call($this->target, $property);
    }

    public function __set($property, $value)
    {
        $fn = fn ($property, $value) => $this->{$property} = $value;

        return $fn->call($this->target, $property, $value);
    }
}


// usage:

class PrivateClass
{
   private $secret = 'lorem'; 
  
   private function cantTouchThis()
   {
       return "oh snap, i've been invaded!";
   }
}

$private = new PrivateClass();

invade($private)->secret;            // 'lorem'
invade($private)->cantTouchThis();   // "oh snap, i've been invaded!"
invade($private)->secret = 'ipsum';  // $secret === 'ipsum'