<?php function test(...$args) { var_dump($args); } test(1, 2, 3); // [1, 2, 3] test(...[1, 2, 3]); // [1, 2, 3] test(...new ArrayIterator([1, 2, 3])); // [1, 2, 3] // Note: It doesn't really make sense to unpack a constant array like [1, 2, 3]. // Normally these would unpack some variable like ...$args
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