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parameter_mystery1

Language/Type: PHP parameter mystery parameters

The following console program uses parameters and produces two lines of output. What are they?

function mystery($x, $z, $y) {
    print("$z, " . ($y - $x) . "\n");
}

$x = 9;
$y = 2;
$z = 5;

mystery($z, $y, $x);
mystery($y, $x, $z);
line 1
line 2

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