3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { public function x() { return $this->foobar ?? 'nope'; } } var_dump((new Foo)->x());
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 - 8.3.7
string(4) "nope"
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/PZqqC on line 7
Process exited with code 255.
preferences:
148.63 ms | 402 KiB | 226 Q