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<?php function foo() { return [null, null]; } var_dump(list($a, $b) = foo()); var_dump((bool)[null, null]);
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.30, 7.4.0 - 7.4.23, 8.0.0 - 8.0.10, 8.1rc1 - rc2
array(2) { [0]=> NULL [1]=> NULL } bool(true)

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67.08 ms | 459 KiB | 5 Q