What are the best practices for handling multiple queries and pagination in PHP?

When dealing with multiple queries and pagination in PHP, it is important to properly manage the data retrieval process to avoid performance issues. One common approach is to limit the number of results per page and use pagination to navigate through the data. Additionally, using prepared statements and indexes in your database queries can help optimize performance. 

// Example code for handling multiple queries and pagination in PHP

// Set the number of results per page
$results_per_page = 10;

// Calculate the total number of pages
$total_pages = ceil($total_results / $results_per_page);

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

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

// Perform the query with pagination
$query = "SELECT * FROM table LIMIT $offset, $results_per_page";
$result = mysqli_query($connection, $query);

// Loop through the results and display them
while ($row = mysqli_fetch_assoc($result)) {
    // Display the data
}

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

Keywords

SQL queries pagination MySQLi PDO LIMIT and OFFSET

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