What are some common pitfalls to avoid when designing PHP pages that display a large number of database records?

One common pitfall to avoid when designing PHP pages that display a large number of database records is not implementing pagination. Pagination helps improve performance by limiting the number of records displayed on each page, reducing the load time and preventing the page from becoming too cluttered. Additionally, not utilizing proper indexing on the database can also lead to slow loading times when querying a large number of records.

// Implementing pagination in PHP to display a limited number of records per page
$page = isset($_GET['page']) ? $_GET['page'] : 1;
$records_per_page = 10;
$offset = ($page - 1) * $records_per_page;

$query = "SELECT * FROM records LIMIT $offset, $records_per_page";
$result = mysqli_query($connection, $query);

while ($row = mysqli_fetch_assoc($result)) {
    // Display each record
}
```

```php
// Adding proper indexing to the database table for faster querying
ALTER TABLE records ADD INDEX index_name (column_name);