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<?php function modify_in_place($prices) { $prices[0] = 100; } function modify_location($prices) { $prices = [40, 50, 60]; } $prices = [1, 2, 3]; modify_in_place($prices); echo ($prices[0] === 100); //false! pass-by-value $prices = [1, 2, 3]; modify_location($prices); echo ($prices[0] === 40); //false! pass-by-value
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