multisort

<?php
date_default_timezone_set('Europe/Sofia');

$text = preg_split("/\\r?\n/", $_GET['text'], -1, PREG_SPLIT_NO_EMPTY);
$minPrice = floatval($_GET['min-price']);
$maxPrice = floatval($_GET['max-price']);
$sortCriteria = $_GET['sort'];
$order = $_GET['order'];

$data = array();
$sortArr = array();
$dateArr = array();
$index = 0;

foreach ($text as $token) {
    $tokens = explode('/', $token);
    $author = trim($tokens[0]);
    $name = trim($tokens[1]);
    $genre = trim($tokens[2]);
    $price = trim($tokens[3]);
    $date = date_create(trim($tokens[4]));
    $info = trim($tokens[5]);
    if ($price < $minPrice || $price > $maxPrice) {
        continue;
    }

    $data[] = [
                "author" => $author,
                "name" => $name,
                "genre" => $genre,
                "price" => $price,
                "publish-date" => $date,
                "info" => $info
               ];
//Ей тия два масива използвам за multisort. Нещо като се промени тук, се променя и в главния масив. Туй е : )
    $sortArr[] = $data[$index++][$sortCriteria];
    $dateArr[] = $date;
}

$sort = $order == 'ascending' ? SORT_ASC : SORT_DESC;

array_multisort($sortArr, $sort, $dateArr, SORT_ASC, $data);



foreach ($data as $book) {
    echo "<div>";
    echo "<p>" . htmlspecialchars($book['name']) . "</p>";
    echo "<ul>";
    echo "<li>" . htmlspecialchars($book['author']) . "</li>";
    echo "<li>" . htmlspecialchars($book['genre']) . "</li>";
    echo "<li>" . htmlspecialchars($book['price']) . "</li>";
    echo "<li>" . $book['publish-date']->format('Y-m-d') . "</li>";
    echo "<li>" . htmlspecialchars($book['info']) . "</li>";
    echo "</ul>";
    echo "</div>";
}