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<?php $x = NULL; $y = NULL; $z = 3; var_dump($x ?? $y ?? $z); // int(3) $a = false; $b = true; var_dump($a ?? $b); // bool(false) $d = 42; var_dump($c ?? $d); // int(42) $e = $c; var_dump($e);
Output for git.master, git.master_jit, rfc.property-hooks
int(3) bool(false) int(42) Warning: Undefined variable $c in /in/gIrL4 on line 15 NULL

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