[PHP] ENVATO MARKETPLACES APi iTEM DOWNLOADER

<?php
/*   _____ _____ _ _____ _____         _____ _____ _____ _____
 ___|     | __  |_|  _  |_   _|___ ___|_   _|   __|  _  |     |
|_ -|   --|    -| |   __| | | |- _|___| | | |   __|     | | | |
|___|_____|__|__|_|__|    |_| |___|     |_| |_____|__|__|_|_|_|
|s C R i P T z - T E A M . i N F O|----------------------------

[PHP] ENVATO MARKETPLACES APi iTEM DOWNLOADER

*/
if (isset($_GET['username']) && $_GET['username'] != "") {
    $url = "http://marketplace.envato.com/api/v3/" . $_GET['username'] . '/' . $_GET['api-key'] . '/download-purchase:' . $_GET['licence_code'] . '.json';
    $url = htmlspecialchars($url);

    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HEADER, false);
    $data = curl_exec($ch);
    $json = json_decode($data, true);
    if (isset($json['download-purchase'])) {
        if (isset($json['download-purchase']['download_url'])) {
            $url = $json['download-purchase']['download_url'];
?>
            [Downloading]
            <script>window.location.href="<?php
            echo $url;
?>";</script>
            <?php
            exit;
        }
    }
    echo "Failed. API or Licence code incorrect";
}
?>
<form action="" method="GET">
USERNAME: <input type="text" name="username"> <br /><br />
API-KEY: <input type="text" name="api-key"> <br /><br />
LiCENCE CODE: <input type="text" name="licence_code"> <br /><br />
<input type="submit" value="DOWNLOAD">
</form>