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run code in 300+ PHP versions simultaneously
<?php interface I { // In Symfony 5.4 this is: // public static function test($s, $i, $m); // In Symfony 6.0 this is: public static function test(string $s, int $i, mixed $m): mixed; } class A implements I { public static function test($s, $i, $m) { var_dump($s, $i, $m); } } A::test('string', 1, NULL);

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