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run code in 300+ PHP versions simultaneously
<?php declare(strict_types=1); // so only PHP 7 will show up class FooBar { private $x; public function __construct() { var_dump($this); echo "Let's remove a property!", PHP_EOL; 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 - 7.0.20, 7.1.0 - 7.1.33, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
object(FooBar)#1 (1) { ["x":"FooBar":private]=> NULL } Let's remove a property! object(FooBar)#1 (1) { ["x":"FooBar":private]=> NULL } Let's add a property! object(FooBar)#1 (1) { ["x":"FooBar":private]=> int(2) } Where did the private come from?
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Warning: Unsupported declare 'strict_types' in /in/MeWv3 on line 3 object(FooBar)#1 (1) { ["x":"FooBar":private]=> NULL } Let's remove a property! object(FooBar)#1 (1) { ["x":"FooBar":private]=> NULL } Let's add a property! object(FooBar)#1 (1) { ["x":"FooBar":private]=> int(2) } Where did the private come from?

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