3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo() { return $res = array(); } if (empty(foo())) { echo "empty"; }
Output for 5.5.24 - 5.5.35, 5.6.8 - 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
empty
Output for 5.4.1 - 5.4.45
Fatal error: Can't use function return value in write context in /in/BXllc on line 6
Process exited with code 255.
preferences:
207.58 ms | 401 KiB | 270 Q