3v4l.org

run code in 300+ PHP versions simultaneously
<?php phpversion() >= "7.0.0" or die(); class FooBar { public $x; public function __construct() { var_dump($this); echo "Let's remove a property!", PHP_EOL; unset($this->x); var_dump($this); echo "Let's add a property!", PHP_EOL; $this->x = 2; var_dump($this); echo "Where did the private come from?", PHP_EOL; } } $foobar = new Foobar;
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.26, 7.3.0 - 7.3.13, 7.4.0 - 7.4.1
object(FooBar)#1 (1) { ["x"]=> NULL } Let's remove a property! object(FooBar)#1 (0) { } Let's add a property! object(FooBar)#1 (1) { ["x"]=> int(2) } Where did the private come from?
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
preferences:
140.13 ms | 402 KiB | 196 Q