php 自定义分页函数

浏览数：39 / 时间：2015年06月09日

<?php
  /**
     * 分页函数
     * @param type $num 数据总数
     * @param type $perpage 每页总数
     * @param type $curpage 当前分页
     * @param type $mpurl 路径
     * @param type $maxpages 最大分页
     * @param type $page  
     * @param type $autogoto
     * @param type $simple
     * @return type
     */
    function multi($num, $perpage, $curpage, $mpurl, $maxpages = 0, $page = 10, $autogoto = FALSE, $simple = FALSE) {
        $ajaxtarget = ‘‘;
        $shownum = $showkbd = FALSE;
        $prev_page = ‘上一页‘;
        $next_page = ‘下一页‘;

        //URL分析：
        $mpurl = empty($mpurl) ? $_SERVER[‘REQUEST_URI‘] : $mpurl;
        $parse_url = parse_url($mpurl);

        //单独取出URL的查询字串
        if ($parse_url["path"] && $parse_url["query"]) {
            $url = $url_query = $parse_url["query"];
        } else {
            $url = $url_query = $parse_url["path"];
        }

        if ($url_query) {
            //因为URL中可能包含了页码信息，我们要把它去掉，以便加入新的页码信息。
            $url_query = preg_replace("/((^|&)page=$curpage|page\/$curpage)/i", ‘‘, $url_query); //兼容path_info 模式
            //将处理后的URL的查询字串替换原来的URL的查询字串：
            $mpurl = str_replace($url, $url_query, $mpurl);
        }

        $a_name = ‘‘;
        if (strpos($mpurl, ‘#‘) !== FALSE) {
            $a_strs = explode(‘#‘, $mpurl);
            $mpurl = $a_strs[0];
            $a_name = ‘#‘ . $a_strs[1];
        }

        $mpurl .= strpos($mpurl, ‘?‘) !== FALSE ? ‘&amp;‘ : ‘?‘;

        $realpages = 1;
        $page -= strlen($curpage) - 1;
        if ($page <= 0) {
            $page = 1;
        }
        if ($num > $perpage) {

            $offset = floor($page * 0.5);

            $realpages = @ceil($num / $perpage);
            $pages = $maxpages && $maxpages < $realpages ? $maxpages : $realpages;

            if ($page > $pages) {
                $from = 1;
                $to = $pages;
            } else {
                $from = $curpage - $offset;
                $to = $from + $page - 1;
                if ($from < 1) {
                    $to = $curpage + 1 - $from;
                    $from = 1;
                    if ($to - $from < $page) {
                        $to = $page;
                    }
                } elseif ($to > $pages) {
                    $from = $pages - $page + 1;
                    $to = $pages;
                }
            }

            $multipage = ‘‘;
            $multipage = ($curpage - $offset > 1 && $pages > $page ? ‘<a href="‘ . $mpurl . ‘page=1‘ . $a_name . ‘" class="first"‘ . $ajaxtarget . ‘>首页</a>‘ : ‘‘) .
                    ($curpage > 1 && !$simple ? ‘<a href="‘ . $mpurl . ‘page=‘ . ($curpage - 1) . $a_name . ‘" class="pages-pre"‘ . $ajaxtarget . ‘>‘ . $prev_page . ‘</a>‘ : ‘‘);
            for ($i = $from; $i <= $to; $i++) {
                $multipage .= $i == $curpage ? ‘<strong>‘ . $i . ‘</strong>‘ :
                        ‘<a href="‘ . $mpurl . ‘page=‘ . $i . ($ajaxtarget && $i == $pages && $autogoto ? ‘#‘ : $a_name) . ‘"‘ . $ajaxtarget . ‘>‘ . $i . ‘</a>‘;
            }
            $multipage .= ($curpage < $pages && !$simple ? ‘<a href="‘ . $mpurl . ‘page=‘ . ($curpage + 1) . $a_name . ‘" class="pages-next"‘ . $ajaxtarget . ‘>‘ . $next_page . ‘</a>‘ : ‘‘) .
                    ($to < $pages ? ‘<a href="‘ . $mpurl . ‘page=‘ . $pages . $a_name . ‘" class="last"‘ . $ajaxtarget . ‘>末页</a>‘ : ‘‘) .
                    ($showkbd && !$simple && $pages > $page && !$ajaxtarget ? ‘<kbd><input type="text" name="custompage" size="3" onkeydown="if(event.keyCode==13) {window.location=\‘‘ . $mpurl . ‘page=\‘+this.value; doane(event);}" /></kbd>‘ : ‘‘);

            $multipage = $multipage ? ‘<div class="pages fr">‘ . ($shownum && !$simple ? ‘<em>&nbsp;‘ . $num . ‘&nbsp;</em>‘ : ‘‘) . $multipage . ‘</div>‘ : ‘‘;
        }
        $maxpage = $realpages;
        return $multipage;
    }
?>