A paging example

exempel.php

<?php
    require 'html.php';

    // Lite variabler
    $page           = isset($_GET['start']) ? max((int)$_GET['start'], 1) : 1; // nuvarande sida
    $items_per_page = 25; // antal saker per sida
    $total_items    = 10000; // antal saker (totalt), fås troligtvis från en “SELECT COUNT(*) FROM …” query

    $paging = paging($page, ceil($total_items / $items_per_page), 3);
    // Paging innehåller nu all HTML som behövs för din paging, skriv ut den på rätt plats
    echo $paging;

html.php

<?php
    /**
     * Calculates the correct paging offsets and returns
     * the view using them
     * 
     * @author Kim Burgestrand (http://github.com/Burgestrand/template/blob/master/classes/template/html.php)
     * @param int current page
     * @param int total pages
     * @param int max number of pages shown at a time
     * @return string
     */
    function paging($page, $total, $pages = 10)
    {
        $diff = floor($pages / 2);
        $data = array(
            'start'     => 1, // first page
            'decrement' => max(1 /*start */, $page - $pages),
            'low'       => max(1 /*start */, min($total - $diff * 2, $page - $diff)),
            'current'   => $page,
            'high'      => min($total, max($pages, $page + $diff)),
            'increment' => min($total, $page + $pages),
            'end'       => max(1, $total),
            'pages'     => $pages,
        );
                    
        return capture('paging.php', $data);
    }
    
    /**
     * Capture the output of a PHP file (using require)
     * 
     * @author Kim Burgestrand (http://www.phpportalen.net/viewtopic.php?p=670517#670517)
     * @param string path to file
     * @param array variables in scope
     * @return string
     */
    function capture($path, array $variables = array())
    {
        ob_start();
        extract($variables, EXTR_SKIP);
        require $path;
        return ob_get_clean();
    }

paging.php

<?php if ($start == $end) return; ?>
<ol class="nav paging">
    <?php
        $template = '<li><a href="?start=%d">%s</a></li>';
        
        if ($decrement < $low)
        {
            ($start < $decrement) AND printf($template, $start, '««');
            printf($template, $decrement, '«');
        }
        
        for ($i = $low; $i <= $high; ++$i)
        {
            $text = $i == $current ? "[{$i}]" : $i;
            printf($template, $i, $text);
        }
        
        if ($high < $increment)
        {
            printf($template, $increment, '»');
            ($increment < $end) AND printf($template, $end, '»»');
        }
    ?>
</ol>