Online PHP editor | output for UmI9k

@ 2015-12-07T14:47:49Z

<?php

class Item
{
    private $notifier;

    public function __construct(callable $notifier)
    {
        $this->notifier = $notifier;
    }

    private function setTtl($time)
    {
        call_user_func($this->notifier, $time);
    }
}

class Pool
{
    private $ttls = [];

    public function getItem($id)
    {
        $items[$id] = new Item(function ($ttl) use ($id) {
           $this->ttls[$id] = $ttl; 
        });
    }

    public function getTtl($id)
    {
        return $this->ttls[$id];
    }
}

$pool = new Pool;

$item = $pool->getItem('foo');
$item->setTtl(60);
echo $pool->getTtl(60);

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7: Fatal error: Uncaught Error: Call to a member function setTtl() on null in /in/UmI9k:38 Stack trace: #0 {main} thrown in /in/UmI9k on line 38
Process exited with code 255.
Output for 5.6.8 - 5.6.28: Fatal error: Call to a member function setTtl() on null in /in/UmI9k on line 38
Process exited with code 255.
Output for 5.5.24 - 5.5.35: Fatal error: Call to a member function setTtl() on a non-object in /in/UmI9k on line 38
Process exited with code 255.

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