3v4l.org

run code in 300+ PHP versions simultaneously
<?php abstract class Singleton { protected static $instance = null; /** * make contrutor not public */ protected function __construct() { } /** * @return static */ public static function getInstance() { if (static::$instance === null) { static::$instance = new static(); } return static::$instance; } } class ExampleSingleton extends Singleton { public $name = 'x'; } $s = ExampleSingleton::getInstance(); echo $s->name; $s->name = 'y'; echo ExampleSingleton::getInstance()->name; $s2 = new ExampleSingleton(); echo $s2->name;
Output for git.master, git.master_jit, rfc.property-hooks
xy Fatal error: Uncaught Error: Call to protected Singleton::__construct() from global scope in /in/BrfO4:42 Stack trace: #0 {main} thrown in /in/BrfO4 on line 42
Process exited with code 255.

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

preferences:
51.29 ms | 401 KiB | 8 Q