Computer Store

<?php
$text = $_GET['list'];
$minPrice = $_GET['minPrice'];
$maxPrice = $_GET['maxPrice'];
$filter = $_GET['filter'];
$order = $_GET['order'];



$property = "price";
$arrayOfProducts = array();

$products = preg_split("/\r?\n/", $text, -1, PREG_SPLIT_NO_EMPTY);


$counter = 1;
array_walk($products, function(&$val) {
    $val .= "|" . $GLOBALS['counter'];
    $GLOBALS['counter']++;
});


$products = array_filter($products, function($val) {
    $info = explode('|', $val);

    if(trim($info[1]) != $GLOBALS['filter'] && $GLOBALS['filter'] != 'all') {
        return false;
    }
    if(trim($info[3]) < $GLOBALS['minPrice'] || trim($info[3]) > $GLOBALS['maxPrice']) {
        return false;
    }
    return true;
});

$products = array_combine(range(0, count($products) - 1), $products);

for($i = 0; $i < count($products) ;$i++) {
    $currLine = explode('|', $products[$i]);

    $currLine = array_filter($currLine, function($val) {
        if($val == "") {
            return false;
        }
        return true;
    });

    $newEntry = new stdClass();
    $newEntry->name = trim($currLine[0]);
    $newEntry->type = trim($currLine[1]);
    $newEntry->comps = trim($currLine[2]);
    $newEntry->price = trim(number_format(floatval($currLine[3]), 2, '.', ''));
    $newEntry->id = trim($currLine[4]);
    $arrayOfProducts[] = $newEntry;
}

usort($arrayOfProducts, function($s1, $s2) use ($order, $property) {
    if ($s1->$property == $s2->$property) {
        return strcmp($s1->id, $s2->id);
    }
    return ($order == "ascending" ^ $s1->$property < $s2->$property) ? 1 : -1;
});

for($i = 0; $i < count($arrayOfProducts) ;$i++) {
    $components = explode(", ", $arrayOfProducts[$i]->comps);

    echo '<div class="product" id="product' . $arrayOfProducts[$i]->id . '">';
    echo '<h2>' . htmlspecialchars(trim($arrayOfProducts[$i]->name))  . '</h2>';
    echo '<ul>';
    foreach ($components as $comp) {
        echo '<li class="component">' . htmlspecialchars(trim($comp)) . '</li>';
    }
    echo '</ul>';

    echo '<span class="price">' . htmlspecialchars(trim($arrayOfProducts[$i]->price)) . '</span>';
    echo '</div>';


}