3v4l.org

run code in 500+ PHP versions simultaneously
<?php class A { public string $a; public string $b; public function __construct( string $a, string $b, ){ $this->a = $a; $this->b = $b; } } $a = new A('b', 'a'); $b = new A('a', 'b'); var_dump($a <=> $b); var_dump($b <=> $a);
Output for 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
int(1) int(-1)

preferences:
44.68 ms | 705 KiB | 4 Q