Online PHP editor | output for YMQer

@ 2016-02-13T16:28:19Z

<?php
class Item {
    private $id;
    public function __construct(int $id)
    {
        $this->id = $id;
    }
    public function id() : int
    {
        return $this->id;
    }
}
class Collection extends IteratorIterator
{
    public function __construct(Item ...$items)
    {
        parent::__construct(
            (function() use ($items) {
                yield from $items;
            })()
        );
    }
    public function current() : Item
    {
        return parent::current();
    }
}
$items = [];
for ($i=0; $i<10; $i++) {
    $items[] = new Item($i);
}
$collection = new Collection(...$items);

foreach ($collection as $item) {
    printf("\tClass: %s. Calling id() method returns %d (%s)\n", get_class($item), $item->id(), gettype($item->id()));
}

Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 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 - 8.2.18, 8.3.0 - 8.3.6: Class: Item. Calling id() method returns 0 (integer) Class: Item. Calling id() method returns 1 (integer) Class: Item. Calling id() method returns 2 (integer) Class: Item. Calling id() method returns 3 (integer) Class: Item. Calling id() method returns 4 (integer) Class: Item. Calling id() method returns 5 (integer) Class: Item. Calling id() method returns 6 (integer) Class: Item. Calling id() method returns 7 (integer) Class: Item. Calling id() method returns 8 (integer) Class: Item. Calling id() method returns 9 (integer)
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40: Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/YMQer on line 8
Process exited with code 255.

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