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<?php class Item { private $id; public function __construct(int $id) { $this->id = $id; } public function id() : int { return $this->id; } } class Items implements IteratorAggregate { private $items = []; public function __construct(Item ...$items) { $this->items = $items; } public function getIterator() : Generator { yield from $this->items; } } class Collection extends IteratorIterator { /** @var Items */ public function __construct(Items $items) { parent::__construct($items); } public function current() : Item { return parent::current(); } } $items = []; for ($i=0; $i<10; $i++) { $items[] = new Item($i); } $collection = new Collection(new Items(...$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 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 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 - 8.3.7
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 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.30
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/OH18b on line 8
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected ':', expecting '{' or ';' in /in/OH18b on line 8
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/OH18b on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/OH18b on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/OH18b on line 3
Process exited with code 255.
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