gistfile1.php

<?php
 
class A {
 
  private $property = "This text should be ALLWAYS accessible\n";
 
 
  public function doSomething(A $instance) {
    if($instance === $this) {
      echo $this->property;
      echo $instance->property;
    }
  }
}
 
 
$a1 = new A();
$a1->doSomething($a1);