3v4l.org

run code in 300+ PHP versions simultaneously
<?php phpversion() >= "7.0.0" or die(); class FooBar { private $x; public function __construct() { var_dump($this); echo "Let's remove a property!", PHP_EOL; unset($this->x); var_dump($this); echo "Let's add a property!", PHP_EOL; $this->y = 2; var_dump($this); echo "Where did the private come from?", PHP_EOL; } } $foobar = new Foobar;
Output for 7.2.6

Process exited with code 137.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0
object(FooBar)#1 (1) { ["x":"FooBar":private]=> NULL } Let's remove a property! object(FooBar)#1 (0) { } Let's add a property! object(FooBar)#1 (1) { ["y"]=> int(2) } Where did the private come from?
Output for 5.5.0 - 5.5.36, 5.6.0 - 5.6.28
preferences:
96.44 ms | 402 KiB | 82 Q