04_Price_List_exam_task

<?php
$table = $_GET['priceList'];

$matches = [];
$categories = [];
preg_match_all("|<td>\s*(.*?)\s*</td>\s*<td>\s*(.*?)\s*</td>\s*<td>\s*(.*?)\s*</td>\s*<td>\s*(.*?)\s*</td>|", $table, $matches, PREG_PATTERN_ORDER);
unset($matches[0]);

for($j = 0 ; $j < count($matches[2]); $j++) {
    $key = html_entity_decode($matches[2][$j]);
    $productKey = html_entity_decode($matches[1][$j]);
    $categories[$key][$productKey][] = [
        "product" => html_entity_decode($matches[1][$j]),
        "price" => html_entity_decode($matches[3][$j]),
        "currency" => html_entity_decode($matches[4][$j])
    ];
}

ksort($categories);
$resultArray = [];

foreach ($categories as $key => $category) {
    ksort($category);
    foreach ($category as $cat) {
        natcasesort($cat);
        foreach ($cat as $k => $v) {
            $resultArray[$key][] = $v;
        }
    }
}

echo json_encode($resultArray);