<?php

class SEGV {
    private $obj;
    public function __construct() { } // there should be construct to get SEGV

    public function segv() {
      $this->obj->attribute = "TEST";
    }

    public function getObj() {
      return $this->obj;
    }
  }

$s = new SEGV;
//$s->segv(); // if value of obj is set from the inside of class, it will not get SEGV. 
$s->getObj()->attribute["TEST"] = "TEST"; // member value is set from the outside of class
$s->segv(); // this set function will get SEGV
$s->segv();
echo "SUCCESS\n";
?>