API key not found in the URL query string.

PHP YouTube Video Downloader Script

PHP YouTube Video Downloader Script

 <?php
$key = 'apikey';
$error = "";

if (isset($_GET[$key])) {
    $api_key = $_GET[$key];
    // Use the retrieved API key as needed
} else {
    $error = "API key not found in the URL query string.";
}
?>

    <?php if (!empty($error)) : ?>
        <p><?php echo $error; ?></p>
    <?php endif; ?>
    
    <form id="apiForm" action="" method="get">
        <label for="api_key">API Key:</label>
        <input type="text" id="api_key" name="apikey" value="<?php echo isset($api_key) ? $api_key : ''; ?>">
    </form>
    
    <script>
        document.getElementById('api_key').addEventListener('paste', function() {
            document.getElementById('apiForm').submit();
        });
    </script>
</body>
</html>



<html lang="en">
<head>
<title>PHP YouTube Video Downloader Script</title>
<link rel='stylesheet' href='style.css' type='text/css' />
<link rel='stylesheet' href='form.css' type='text/css' />
<link rel='stylesheet' href='table.css' type='text/css' />
</head>
<body>
    <div class="phppot-container">
        <form method="post" action="">
            <h1>PHP YouTube Video Downloader Script</h1>
            <div class="row">
                <input type="text" class="inline-block"
                    name="youtube-video-url">
                <button type="submit" name="submit" id="submit">Download
                    Video</button>
            </div>
        </form>
<?php
if (isset($_POST['youtube-video-url'])) {
    $videoUrl = $_POST['youtube-video-url'];
    ?>
<p>
            URL: <a href="<?php echo $videoUrl;?>"><?php echo $videoUrl;?></a>
        </p>
<?php
}
if (isset($_POST['submit'])) {
    preg_match('%(?:youtube(?:-nocookie)?\.com/(?:[^/]+/.+/|(?:v|e(?:mbed)?)/|.*[?&]v=)|youtu\.be/)([^"&?/ ]{11})%i', $videoUrl, $match);
    $youtubeVideoId = $match[1];
    require './youtube-video-meta.php';
    $videoMeta = json_decode(getYoutubeVideoMeta($youtubeVideoId, $key));
    $videoThumbnails = $videoMeta->videoDetails->thumbnail->thumbnails;
    $thumbnail = end($videoThumbnails)->url;
    ?>
    <p>
            <img src="<?php echo $thumbnail; ?>">
        </p>
            <?php $videoTitle = $videoMeta->videoDetails->title; ?>
            <h2>Video title: <?php echo $videoTitle; ?></h2>
       <?php
    $shortDescription = $videoMeta->videoDetails->shortDescription;
    ?>
    <p><?php echo str_split($shortDescription, 100)[0];?></p>
    <?php
    $videoFormats = $videoMeta->streamingData->formats;
    if (! empty($videoFormats)) {
        if (@$videoFormats[0]->url == "") {
            ?>
            <p>
            <strong>This YouTube video cannot be downloaded by the
                downloader!</strong><?php
            $signature = "https://example.com?" . $videoFormats[0]->signatureCipher;
            parse_str(parse_url($signature, PHP_URL_QUERY), $parse_signature);
            $url = $parse_signature['url'] . "&sig=" . $parse_signature['s'];
            ?>
        </p>
        <?php
            die();
        }
        ?>
            <h3>With Video & Sound</h3>
        <table class="striped">
            <tr>
                <th>Video URL</th>
                <th>Type</th>
                <th>Quality</th>
                <th>Download Video</th>
            </tr>
                    <?php
        foreach ($videoFormats as $videoFormat) {
            if (@$videoFormat->url == "") {
                $signature = "https://example.com?" . $videoFormat->signatureCipher;
                parse_str(parse_url($signature, PHP_URL_QUERY), $parse_signature);
                $url = $parse_signature['url'] . "&sig=" . $parse_signature['s'];
            } else {
                $url = $videoFormat->url;
            }
            ?>
            <tr>
                <td><a href="<?php echo $url; ?>">View Video</a></td>
                <td><?php if($videoFormat->mimeType) echo explode(";",explode("/",$videoFormat->mimeType)[1])[0]; else echo "Unknown";?></td>
                <td><?php if($videoFormat->qualityLabel) echo $videoFormat->qualityLabel; else echo "Unknown"; ?></td>
                <td><a
                    href="video-downloader.php?link=<?php echo urlencode($url)?>&title=<?php echo urlencode($videoTitle)?>&type=<?php if($videoFormat->mimeType) echo explode(";",explode("/",$videoFormat->mimeType)[1])[0]; else echo "mp4";?>">
                        Download Video</a></td>
            </tr>
                    <?php } ?>
                </table>
<?php
        // if you wish to provide formats based on different formats
        // then keep the below two lines
        $adaptiveFormats = $videoMeta->streamingData->adaptiveFormats;
        include 'adaptive-formats.php';
        ?>
    <?php } } ?>
    </div>
</body>
</html>

<?php
    //Allow or disallow source viewing
    define("ALLOW_SOURCE",TRUE);
    define("ALLOW_TITLE",TRUE);
    if(ALLOW_SOURCE && isset($_GET['source'])){
        highlight_file(__FILE__);
        exit(0);
    }
?>
<a target="_blank" href="?source">Source Code</a>