php分页程序paginator程序代码

作者：袖梨 2022-06-24
 代码如下 复制代码
 
class paginator {
 
    function __construct () {
 
    }
 
    static function render($page_type, array $args = array()) {
        $html = '';
        switch ($page_type)
        {
            case '1':
                $html =  page_1($channel_code, $page_num, $cur_page, $per_group, $base_url, $n, $v);
                break;
            case '2':
                $html =  fpage($row_num, $pagesize, $page, $url);
                break;
            case '3':
                break;
 
            default:
                $html = page($num, $perpage, $curpage, $mpurl, $hiddenFrom='');
        }
 
        return $html;
    }
 
 
 
    //函数1:根据总页数,当前页,和页分组及url产生分页导航
    function page_1($channel_code, $page_num, $cur_page, $per_group, $base_url, $n, $v) {
        // 分页函数参数列表(有多少页,当前页,每页多少个 ,链接地址)
        $base_url .= strpos($base_url, '?') ? '&' : '?';    //如果有?，则添加&,否则加？
 
        $page_val = "";
 
        if ($page_num < 1) {
            return $page_val; //如果小于1,返回空
        } elseif ($page_num == 1) {
            return $page_val = 1;   //如果等于1,返回1
        }
 
        //分组
 
        $group_ok = !(($page_num-1) % ($per_group-1));  //没有余数
        // 计算一共有多少组
        if($group_ok) {
            $group_num = ($page_num-1)/($per_group-1);
        }else {
            $group_num = ceil(($page_num-1) / ($per_group-1));
        } //判断当前页是否为一组的最后一个
 
 
        //组数
        $is_last_page = !(($cur_page-1) % ($per_group-1)); //计算当前在的组数
        if ($is_last_page) {
            $cur_group = ($cur_page-1) / ($per_group-1) + 1;
        } else {
            $cur_group = ceil(($cur_page-1) / ($per_group-1));
        }
 
        // 计算显示的起始页 ，这个关键
        $from = ($cur_group - 1) * ($per_group-1) + 1;
        $from = $cur_group <= 1 ? 1 :$from;
 
        $to = $from + $per_group;
        $to = $to > $page_num ? $page_num + 1 : $to;
 
        for($a = $from; $a < $to; $a++) {
            if ($a != $cur_page) {
 
                //不是当前页
                $page_val .= '
  • ' . $a . '
    • ';
                } else {
                    //当前页
                    $page_val .='
  • '. $a .'
    • ';
                }
            }
     
            //上一页下一页首页尾页
            $next = $cur_page + 1;    //当前页+1
            $prev = $cur_page-1;   //当前页-1
     
            if ($cur_page != $page_num) {
                //当前页不是最后一页
                $page_val .= '' . '下一页' . '';
                $page_val .= '' . '>>' . ''; //尾页
     
            }
            if ($cur_page != 1){
     
                //不是第一页,加上前面的内容
                $page_val = '' . '上一页' . '' . $page_val;
                $page_val = '' . '<<' . '' . $page_val; //首页
     
            }
            $page_val = '
      '.$page_val.'
    ';
     
     
            return $page_val;
        }
     
     
     
     
        // 函数2：根据记录数，页列清数，当前页，url年成分页
        function fpage($row_num, $pagesize, $page, $url) {
            //$page,当前页;$row_num记录总数;$pagesize:每页记录数;$url记录页;
            //如果,如果有作数,则取加1
            $page_count = $row_num % $pagesize?intval($row_num / $pagesize) + 1:intval($row_num / $pagesize);
     
            if ($page_count == 1) {
                $page_string = "第一页|上一页|下一页|尾页";
            } else {
                //如果不止一页
                if ($page == 1) {
                    //第一页显示
                    $page_string = " 第一页 |上一页| 下一页 | 尾页 ";
                }
                if (($page > 1) and ($page < $page_count)) {
                    $page_string = " 第一页 | 上一页 | 下一页 | 尾页 ";
                }
                if ($page == $page_count) {
                    $page_string = " 第一页 | 上一页 |下一页| 尾页 ";
                }
            }
            $page_str = $page_string . ("," . $page . "/" . $page_count . "页");
            echo "

    " . $page_str . "

    ";
        }
     
     
        /**
     * 分页函数
     *
     * @param int $num:记录总数
     * @param int $perpage:每页记录
     * @param int $curpage:当前页
     * @param string $mpurl:路径url
     * @param unknown_type $hiddenFrom
     * @return string
     */
        function page($num, $perpage, $curpage, $mpurl,$hiddenFrom='') {
            $multipage = '';
            //恢复
            $mpurl .= strpos($mpurl, '?') ? '&' : '?';
     
            if($num > $perpage) {
                $page = 10;
                $offset = 2;
     
                $pages = @ceil($num / $perpage);  //总页数
     
                if($page > $pages) {
                    $from = 1;
                    $to = $pages;
                } else {
                    //如果总页数>10
                    $from = $curpage - $offset;   //当前页-2
                    $to = $from + $page - 1;    //当前页+10-3
     
                    if($from < 1) {
     
                        $to = $curpage + 1 - $from;
                        $from = 1;
                        if($to - $from < $page) {
                            $to = $page;
                        }
                    } elseif($to > $pages) {
                        $from = $pages - $page + 1;
                        $to = $pages;
                    }
                }
     
                if ($hiddenFrom) {
                    $multipage = ($curpage - $offset > 1 && $pages > $page ? '首页 ' : '').
                    ($curpage > 1 ? ' ‹‹上一页 ' : '');
                    for($i = $from; $i <= $to; $i++) {
                        $multipage .= $i == $curpage ? ''.$i.' ' :
                        ''.$i.' ';
                    }
     
                    $multipage .= ($curpage < $pages ? '下一页››' : '').
                    ($to < $pages ? ' 末页' : '');
                    $multipage = $multipage ? '
    '.$multipage.'
    ' : '';
                } else {
     
                    $multipage = ($curpage - $offset > 1 && $pages > $page ? '首页 ' : '').
                    ($curpage > 1 ? ' ‹‹上一页 ' : '');
     
                    for($i = $from; $i <= $to; $i++) {
                        $multipage .= $i == $curpage ? ''.$i.' ' :
                        ''.$i.' ';
                    }
     
                    $multipage .= ($curpage < $pages ? '下一页››' : '').
                    ($to < $pages ? ' 末页' : '');
                    $multipage = $multipage ? '
    '.$multipage.'
    ' : '';
                }
            }
            return $multipage;
        }
        //暂不用
        function page_get_start($page, $ppp, $totalnum) {
            $totalpage = ceil($totalnum / $ppp);
            $page =  max(1, min($totalpage, intval($page)));
            return ($page - 1) * $ppp;
        }
        //暂不用
        function js_page($hiddenFrom,$page)
        {
            if ($hiddenFrom) {
                return ' onclick=javascript:$("#page").val("'.$page.'");$("#'.$hiddenFrom.'").submit(); ';
            }
        }
    }
     
     
     
    ?>

    相关文章

    精彩推荐