What are some best practices for optimizing the performance of PHP applications that involve displaying images from a database with limited records per page?

When displaying images from a database with limited records per page in a PHP application, it is important to optimize performance by utilizing pagination to limit the number of records retrieved at once. This can help reduce the load on the database and improve the overall speed of the application. Additionally, resizing and caching images can also help improve performance by reducing the file size and minimizing the number of requests needed to display the images. 

// Example PHP code snippet for implementing pagination when displaying images from a database

// Set the number of records to display per page
$recordsPerPage = 10;

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

// Calculate the offset for the SQL query
$offset = ($page - 1) * $recordsPerPage;

// Query the database for images with pagination
$sql = "SELECT * FROM images LIMIT $offset, $recordsPerPage";
$result = mysqli_query($conn, $sql);

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

// Display pagination links
$totalRecords = mysqli_num_rows(mysqli_query($conn, "SELECT * FROM images"));
$totalPages = ceil($totalRecords / $recordsPerPage);

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

Keywords

pagination image caching lazy loading database indexing image compression

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