数组乘以答案并返回它

Question

This is what I am trying to do. I would like my code to return the following:

"The volume of the small box is: 300"

But I cannot seem to figure out what to do:

<?php
    $box = array(
       "Small box" => array("length" => 12, "width" => 10, "depth" => 2.5),
       "Medium box" => array("length" => 30, "width" => 20, "depth" => 4),
       "Large box" => array("length" => 60, "width" => 40, "depth" => 11.5)

    );
    foreach ($box as $number => $boxes)
    {
        echo "The volume of the "."$number"." is: \t";
        foreach ($boxes as $value)            
        {
            if (is_numeric($value))
            {
               $sum = array_product($boxes);
               echo "$sum";
            }
        }
        echo "<br />";
    }
    ?>

Answer 1

You are looping through the $value, calculating and displaying the $sum multiple (3) times. Just calculate the product:

foreach ($box as $number => $boxes)
{
    echo "The volume of the "."$number"." is: \t";
    echo array_product($boxes);

    echo "<br />";
}

If you don't have a predictable array with length, width and depth then there is little point in doing this at all, but you could also do:

    echo $boxes['length'] * $boxes['width'] * $boxes['depth'];