What are some common pitfalls to avoid when implementing pagination in PHP applications that interact with MySQL databases?

One common pitfall to avoid when implementing pagination in PHP applications that interact with MySQL databases is not properly sanitizing user input, which can lead to SQL injection attacks. To prevent this, always use prepared statements with bound parameters to safely query the database. 

// Connect to the database
$pdo = new PDO('mysql:host=localhost;dbname=your_database', 'username', 'password');

// Get the page number from the URL and sanitize it
$page = filter_input(INPUT_GET, 'page', FILTER_VALIDATE_INT);

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

// Calculate the offset
$offset = ($page - 1) * $limit;

// Prepare and execute the query using prepared statements
$stmt = $pdo->prepare("SELECT * FROM your_table LIMIT :limit OFFSET :offset");
$stmt->bindParam(':limit', $limit, PDO::PARAM_INT);
$stmt->bindParam(':offset', $offset, PDO::PARAM_INT);
$stmt->execute();

// Fetch the results
$results = $stmt->fetchAll(PDO::FETCH_ASSOC);

// Display the results
foreach ($results as $result) {
    echo $result['column_name'] . "<br>";
}

Keywords

pagination PHP MySQL database interactions error handling

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