What are the considerations for handling a large number of photos in a database for a photo gallery?

When handling a large number of photos in a database for a photo gallery, considerations include optimizing database queries for efficient retrieval, using pagination to display photos in smaller batches, storing photos in a file system and only storing references in the database, and implementing caching mechanisms to reduce database load. 

// Example of using pagination to display photos in a photo gallery

// Set the number of photos to display per page
$photosPerPage = 10;

// Get the current page number from the URL parameter
$page = isset($_GET['page']) ? $_GET['page'] : 1;

// Calculate the offset for the database query
$offset = ($page - 1) * $photosPerPage;

// Query the database for photos with pagination
$query = "SELECT * FROM photos LIMIT $offset, $photosPerPage";
$result = mysqli_query($connection, $query);

// Display the photos
while ($row = mysqli_fetch_assoc($result)) {
    echo '<img src="photos/' . $row['filename'] . '" alt="' . $row['description'] . '">';
}

// Display pagination links
$totalPhotos = mysqli_num_rows(mysqli_query($connection, "SELECT * FROM photos"));
$totalPages = ceil($totalPhotos / $photosPerPage);

for ($i = 1; $i <= $totalPages; $i++) {
    echo '<a href="?page=' . $i . '">' . $i . '</a>';
}

Keywords

database optimization image compression caching lazy loading indexing

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