index de galeria de fotos com PDO

<!DOCTYPE html>
<html lang="pt-br">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
    <link href="https://fonts.googleapis.com/css2?family=Poppins&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="css/style.css">
    <title>Galeria de imagens</title>
</head>
<style>
    body {
    font-family: 'Poppins', sans-serif;
    font-size: 15px;
    }
    </style>
<body>
    <br>
    <div class="container">
        <h4>Listagem de fotos</h4>
        <a href="form_upload.php">Subir imagem</a> | <a href="form_search.php">Pesquisar imagem</a>
        <br><br><br>

      <div class="row">
  <?php
  $pdo = new PDO('mysql:host=______;dbname=__________', 'usuario', 'senha');
  $stmt = $pdo->prepare("SELECT id, name, arquivo FROM tabimagem ORDER BY id DESC");
  $stmt->execute();
  $images = $stmt->fetchAll();
  $i = 0;
  $total_images = count($images);
  $current_page = isset($_GET['page']) ? intval($_GET['page']) : 1;
  $images_per_page = 12;
  $total_pages = ceil($total_images / $images_per_page);
  $start = ($current_page - 1) * $images_per_page;
  $images = array_slice($images, $start, $images_per_page);
  foreach($images as $image):
  ?>
    <div class="col-12 col-md-3">
        <div class="shadow p-3 mb-5 bg-white rounded">
            <!--<img src="<?php echo $image['arquivo']; ?>" class="img-fluid">-->
            <a href="<?php echo  $image["arquivo"]; ?>" target="_blank"><img src="<?php echo  $image["arquivo"]; ?>" width="100%" class="img-fluid"></a>
            <?php echo $image['name']; ?>
        </div>
    </div>
  <?php
    $i++;
    if($i % 12 == 0 && $i != 0){
      echo '</div><div class="row">';
    }
  endforeach;
  ?>
</div>
<div class="text-center">
  <ul class="pagination">
    <?php for($i = 1; $i <= $total_pages; $i++): ?>
      <li class="page-item <?php if($current_page == $i) echo 'active'; ?>">
        <a class="page-link" href="index.php?page=<?php echo $i; ?>"><?php echo $i; ?></a>
      </li>
    <?php endfor; ?>
  </ul>
</div>
    </div>
         <div class="rodape-site">
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  </div>
    </body>
    </html>