0UT1S's

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $url = trim($_POST['url'] ?? '');
    
    // Improved YouTube ID extraction
    preg_match('/(?:youtube\.com\/(?:[^\/]+\/.+\/|(?:v|e(?:mbed)?)\/|.*[?&]v=)|youtu\.be\/)([^"&?\/\s]{11})/', $url, $matches);
    $videoId = $matches[1] ?? '';
    
    if ($videoId) {
        $thumbnails = [
            'maxresdefault' => "https://img.youtube.com/vi/$videoId/maxresdefault.jpg",
            'sddefault' => "https://img.youtube.com/vi/$videoId/sddefault.jpg",
            'hqdefault' => "https://img.youtube.com/vi/$videoId/hqdefault.jpg",
        ];
    } else {
        $error = 'Invalid YouTube URL';
    }
}

include 'header.php';
?>

<div class="max-w-4xl mx-auto bg-white p-6 rounded-lg shadow-md">
    <h1 class="text-3xl font-bold mb-6">YouTube Thumbnail Downloader</h1>
    
    <form method="POST" class="mb-8">
        <input type="url" name="url" placeholder="Enter YouTube URL" 
               class="w-full p-3 border rounded-lg mb-2" required>
        <button type="submit" class="bg-red-600 text-white px-6 py-2 rounded-lg hover:bg-red-700">
            Get Thumbnails
        </button>
    </form>

<?php if($error): ?>
        <div class="bg-red-100 text-red-700 p-3 rounded-lg mb-4"><?= $error ?></div>
    <?php endif; ?>

<?php if($thumbnails): ?>
        <div class="grid grid-cols-1 md:grid-cols-3 gap-4">
            <?php foreach ($thumbnails as $type => $url): ?>
                <div class="border rounded-lg overflow-hidden">
                    <img src="<?= $url ?>" alt="<?= $type ?> thumbnail" 
                         class="w-full h-48 object-cover">
                    <div class="p-3 bg-gray-50">
                        <a href="<?= $url ?>" download="thumbnail_<?= $videoId ?>_<?= $type ?>.jpg"
                           class="bg-blue-600 text-white px-4 py-2 rounded-lg block text-center hover:bg-blue-700">
                            Download
                        </a>
                    </div>
                </div>
            <?php endforeach; ?>
        </div>
    <?php endif; ?>
</div>

<?php include 'footer.php'; ?>