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<?php declare(strict_types=1); function foo(int $x, int $y = 2, ?int &$z = null) { var_dump(func_num_args()); if ($y != null) { $y = $x ** 2; } return $x * $y; } var_dump([foo(5, $a), $a]); var_dump([foo(3)]);
Output for git.master_jit, git.master
Warning: Undefined variable $a in /in/bROYk on line 13 Fatal error: Uncaught TypeError: foo(): Argument #2 ($y) must be of type int, null given, called in /in/bROYk on line 13 and defined in /in/bROYk:5 Stack trace: #0 /in/bROYk(13): foo(5, NULL) #1 {main} thrown in /in/bROYk on line 5
Process exited with code 255.

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