<?php

$items = [
    "washing" => [
        "name" => "Prací prostředky",
        "products" => [
            ["name" => "Persil", "price" => 200],
            ["name" => "Ariel", "price" => 250],
            ["name" => "Formil", "price" => 150]
        ]
    ],
    "cleaning" => [
        "name" => "Čisticí prostředky",
        "products" => [
            ["name" => "Ajax", "price" => 50],
            ["name" => "Cif", "price" => 70],
            ["name" => "Domestos", "price" => 80]
        ]
    ],

];

// echo $items["washing"]["name"];
// echo "<br>";
// echo $items["washing"]["products"][1]["name"];

if (isset($_GET["category"])) {
    $category = $_GET["category"];
    if (isset($items[$category])) {
        
    } else {
        echo "Kategorie nenalezena";
    }
} else {
    echo "Vyberte kategorii";
}