<?php
 
$nissan = Array(
    "model" => "Nissan X-Trail",
    "speed" => "150",
    "doors" => "5",
    "year" => "2017"
);
$toyota = Array(
    "model" => "X5",
    "speed" => "180",
    "doors" => "5",
    "year" => "2015"
);
$isuzu = Array(
    "model" => "Bighorn",
    "speed" => "120",
    "doors" => "5",
    "year" => "2005"
);
 
$cars = Array($toyota => $nissan, "toyota" => $toyota, "isuzu" => $isuzu);
 
foreach ($cars as $mark => $key) {
    echo "Фирма производитель — $mark\n";
 
    foreach ($key as $params => $value) {
        echo "$params — $value\n";
    }
}