3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?hh class Foo { function get(): ?int { static $called = false; if (!$called) { $called = true; return 42; } return null; } } function doStuff(Foo $foo) { var_dump($foo->get() ? $foo->get() : 'was null the first time'); } doStuff(new Foo());
Output for hhvm-3.12.0
NULL
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.34
Parse error: syntax error, unexpected 'class' (T_CLASS) in /in/JqWiI on line 3
Process exited with code 255.
Output for 5.4.0 - 5.4.32
<?hh class Foo { function get(): ?int { static $called = false; if (!$called) { $called = true; return 42; } return null; } } function doStuff(Foo $foo) { var_dump($foo->get() ? $foo->get() : 'was null the first time'); } doStuff(new Foo());