3v4l.org

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<?php function plus(int $firstNumber, int $secondNumber) : int { return $firstNumber + $secondNumber; } echo plus("0a", "1a");
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: plus(): Argument #1 ($firstNumber) must be of type int, string given, called in /in/M0VLZ on line 8 and defined in /in/M0VLZ:3 Stack trace: #0 /in/M0VLZ(8): plus('0a', '1a') #1 {main} thrown in /in/M0VLZ on line 3
Process exited with code 255.

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