3v4l.org

run code in 300+ PHP versions simultaneously
<?php function test(int $n = NULL) { var_dump($n); } test(); test(NULL); test(123); test('123');
Output for 7.0.0 - 7.0.31, 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 - 8.2.19, 8.3.0 - 8.3.7
NULL NULL int(123) int(123)
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
NULL NULL Catchable fatal error: Argument 1 passed to test() must be an instance of int, integer given, called in /in/9N8lf on line 10 and defined in /in/9N8lf on line 3
Process exited with code 255.
preferences:
222.28 ms | 402 KiB | 321 Q