3v4l.org

run code in 300+ PHP versions simultaneously
<?php class MyList implements Countable { public $items; public function __construct($items) { $this->items = $items; } public function __size() { return count($this->items); } } $list = new MyList([1, 2, 3]); echo count($list);
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 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 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Class MyList contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Countable::count) in /in/ksjOb on line 3
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Fatal error: Class MyList contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Countable::count) in /in/ksjOb on line 16
Process exited with code 255.
preferences:
257.7 ms | 402 KiB | 340 Q