3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface A { public function foo($foo); } interface B extends A { public function foo($foo): array; }
Output for 7.1.0 - 7.1.25, 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 - 8.1.29, 8.2.0 - 8.2.23, 8.3.0 - 8.3.11
Output for 5.6.38
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/fsJ6Z on line 9
Process exited with code 255.
preferences:
79.79 ms | 406 KiB | 5 Q