How can PHP scripts be modified to handle large amounts of data without causing downtime or performance issues on a website?

To handle large amounts of data without causing downtime or performance issues on a website, PHP scripts can be modified to use pagination to limit the amount of data retrieved and displayed on each page. This ensures that only a manageable subset of data is processed at a time, improving performance and preventing overload on the server. 

// Example PHP code snippet implementing pagination for handling large amounts of data
$items_per_page = 10;
$page = isset($_GET['page']) ? $_GET['page'] : 1;
$offset = ($page - 1) * $items_per_page;

// Retrieve data from database with LIMIT and OFFSET clauses
$query = "SELECT * FROM table_name LIMIT $items_per_page OFFSET $offset";
$result = mysqli_query($connection, $query);

// Display data on the page
while ($row = mysqli_fetch_assoc($result)) {
    // Display data here
}

// Pagination links
$total_items = // Get total number of items from database
$total_pages = ceil($total_items / $items_per_page);

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

Keywords

PHP data handling performance optimization scalability database management

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