PHP Pagination Tutorial: Simple Steps

To implement pagination, you can use the built-in PHP function array_slice() to paginate an array. The specific steps are as follows:

1. Set the number of data items displayed per page and the current page number. For example, display 10 data items per page with the current page number as $page.
2. Retrieve all data from a database or other data source and store it as an array, for example $items.
3. You can calculate the total number of data records $totalCount using the built-in PHP function count().
4. Calculate the total number of pages $totalPages by rounding up the result of $totalCount divided by $perPage using ceil().
5. Perform pagination on the array using array_slice($items, ($page – 1) * $perPage, $perPage) to obtain the data for the current page.
6. Display the data on the current page by iterating through it.
7. Generate a pagination bar based on the total number of pages and the current page number. You can create the navigation bar by combining HTML and PHP, such as using a for loop to generate clickable page buttons with links.

Here is an example code:

<?php
// 定义每页显示的数据条数
$perPage = 10;

// 获取当前页码
$page = isset($_GET['page']) ? $_GET['page'] : 1;

// 从数据库或其他数据源获取所有数据，并保存为一个数组
$items = array(/* 数据数组 */);

// 计算总数据条数
$totalCount = count($items);

// 计算总页数
$totalPages = ceil($totalCount / $perPage);

// 对数组进行分页操作，得到当前页的数据
$currentPageItems = array_slice($items, ($page - 1) * $perPage, $perPage);

// 遍历当前页的数据进行显示
foreach ($currentPageItems as $item) {
    // 显示数据
}

// 生成分页导航栏
echo '<div class="pagination">';
for ($i = 1; $i <= $totalPages; $i++) {
    echo '<a href="?page=' . $i . '">' . $i . '</a> ';
}
echo '</div>';
?>

The code above calculates the total number of pages and the current page number, then uses the array_slice() function to paginate an array, and generates a pagination bar using a for loop. Depending on the specific situation, you may need to make modifications and adjustments as needed.