3v4l.org

run code in 500+ PHP versions simultaneously
<?php class Foo{ private $a1 = 'A1'; private $a2 = 'A2'; public $a3 = 'A3'; public $a4 = 'A4'; } $foo = new Foo(); print_r(json_decode(json_encode($foo), true));
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.6
Array ( [a3] => A3 [a4] => A4 )

preferences:
114.26 ms | 1843 KiB | 4 Q