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run code in 300+ PHP versions simultaneously
<?php class A { public function __construct(int $x) { echo $x; } } class B extends A { public function __construct(int $y) { parent::__construct($y); } } new B(123);
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.30, 7.4.0 - 7.4.23, 8.0.0 - 8.0.11, 8.1rc1 - rc2
123

preferences:
349.2 ms | 459 KiB | 5 Q