unserialize.php

<?php
class Foo {
  public $value = 'abc';

  public function __wakeup() {
    echo(__LINE__.' '.__METHOD__).PHP_EOL;
  }

  public function __destruct() {
    echo(__LINE__.' '.__METHOD__).PHP_EOL;
  }
}

/*
$obj = new Foo();
echo serialize($obj);
 */

function func($text) {
  echo(__LINE__.' before unserialize').PHP_EOL;

  $a = unserialize($text);

  echo(__LINE__.' after unserialize').PHP_EOL;
}

echo(__LINE__.' before func').PHP_EOL;
func('O:3:"Foo":1:{s:5:"value";s:3:"abc";}');
echo(__LINE__.' end').PHP_EOL;