3v4l.org

run code in 300+ PHP versions simultaneously
<?php Class Foo { } $unserialize = unserialize( serialize(new Foo), ['allowed_classes' => []] ); var_dump($unserialize);
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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
object(__PHP_Incomplete_Class)#1 (1) { ["__PHP_Incomplete_Class_Name"]=> string(3) "Foo" }
Output for 5.4.1 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.21
Warning: unserialize() expects exactly 1 parameter, 2 given in /in/hRY4d on line 11 bool(false)

preferences:
184.5 ms | 402 KiB | 256 Q