如何在PHP中遍历这个带键的多维数组？ [重复]

I have following array:

<?php
$cars = array(
            "cars" => array
                (
                    array("make" => "Volvo", "model" => "2018", "price" => 31.91),
                    array("make" => "BMW", "model" => "2015", "price" => 34.50),
                    array("make" => "Toyota", "model" => "2019", "price" => 27.58)
                )
            );

echo "<pre>";
print_r($cars);
echo "</pre>";
?>

Human readable form:

Array
(
    [cars] => Array
        (
            [0] => Array
                (
                    [make] => Volvo
                    [model] => 2018
                    [price] => 31.91
                )

            [1] => Array
                (
                    [make] => BMW
                    [model] => 2015
                    [price] => 34.5
                )

            [2] => Array
                (
                    [make] => Toyota
                    [model] => 2019
                    [price] => 27.58
                )

        )

)

How can we traverse this array to get every elements? Is it necessary to use OUTER foreach loop to get access inside cars array? Can we not access them directly if we already knew about the key in advance?

I am using following approach:

<?php
foreach($cars as $key => $array)
{
    echo "Key: " . $key;
    echo "<hr />";
    foreach($array as $sub_key => $sub_array)
    {
        echo "Make:" . $sub_array['make'];
        echo "<br />";
        echo "Model:" . $sub_array['model'];
        echo "<br />";
        echo "Price:" . $sub_array['price'];
        echo "<hr />";
    }
}
?>

Output:

Key: cars

Make:Volvo
Model:2018
Price:31.91

Make:BMW
Model:2015
Price:34.5

Make:Toyota
Model:2019
Price:27.58

How to traverse array elements without using outer foreach loop? I mean without using

foreach($cars as $key => $array)

EDIT

I don't think it is duplicate to those questions in any means. My question is to avoid the need of outer loop and not the inner loop.

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