Combine thinkPHP paging to write your own paging class_PHP tutorial

<?<span php 
</span><span //</span><span  +----------------------------------------------------------------------
// | 参考  ThinkPHP 分页类改变而来
// +----------------------------------------------------------------------
// | 有两种样式：1、当面页码始终在中间。 2、当点到分页条两边的页码时，自动翻页（默认）。
// +----------------------------------------------------------------------
// | Author: zbseoag <zbsoeagy@qq.com>
// +----------------------------------------------------------------------
// $Id: page.class.php  2013-05-26 00:08:49</span>

 <span session_start</span>(); <span //</span><span 由于要记录用户是向前，还是向后翻页，故启用了session</span>

<span class</span><span  Page{

    </span><span public</span> <span $page</span>; <span //</span><span 当前页</span>
    <span public</span> <span $nextPage</span>; <span //</span><span 上一页</span>
    <span public</span> <span $prevPage</span>; <span //</span><span 下一页</span>
    <span public</span> <span $pageMax</span>; <span //</span><span 最大页</span>
    <span public</span> <span $startPage</span>; <span //</span><span 分页条起码</span>
    <span public</span> <span $endPage</span>;  <span //</span><span  分页条止码</span>
    <span public</span> <span $style</span>; <span //</span><span 样式：$style = mid</span>
    <span public</span> <span $parameter</span>;<span //</span><span 页数跳转时要带的参数</span>
    <span public</span> <span $varPage</span>;<span //</span><span 默认分页变量</span>
    <span public</span> <span $url</span> = <span null</span>;  <span //</span><span 指定url地址</span>
    
    <span protected</span> <span $config</span> = <span array</span><span (
        </span>'header'=>'条记录','prev'=>'上一页','next'=>'下一页','first'=>'首页','last'=>'尾页',
        'theme' => '%records% %header% %page%/%pageMax% 页  %firstPage%%prevPage%%linkPage%%nextPage%%lastPage%'<span 
    );
     
    </span><span /*</span><span *
     +----------------------------------------------------------
     * 架造函数
     +----------------------------------------------------------
     * @param  $records   总的记录数
     * @param  $pageSize  每页显示记录数
     * @param  $pageVal   分页跳转的参数
     * @param  $parameter 附加参数
     +----------------------------------------------------------
    </span><span */</span>
     
    <span function</span> __construct(<span $records</span>, <span $pageSize</span>, <span $pageVal</span> = 'p', <span $parameter</span> = <span null</span><span ){
         
        </span><span $this</span>->records = <span $records</span><span ;
        </span><span $this</span>->pageMax = <span ceil</span>(<span $records</span>/<span $pageSize</span><span );
        </span><span $this</span>->page= <span max</span>(<span intval</span>(<span $_GET</span>[<span $pageVal</span>]), 1); <span //</span><span 最小为1</span>
        <span $this</span>->page = <span min</span>(<span $this</span>->page, <span $this</span>->pageMax); <span //</span><span 最大为末页</span>
        <span $this</span>->nextPage = <span $this</span>->page + 1<span ;
        </span><span $this</span>->prevPage = <span $this</span>->page - 1<span ;
        </span><span $this</span>->varPage = <span $pageVal</span>; <span //</span><span 默认分页变量名</span>
        <span $this</span>->parameter = <span $parameter</span>; <span //</span><span 附加 url 参数</span>
<span     }
     
    </span><span /*</span><span *
     +----------------------------------------------------------
     * 设置样式
     +----------------------------------------------------------
     * @param  $name   内置参数名
     * @param  $value  给定参数值
     +----------------------------------------------------------
     </span><span */</span>
    <span function</span> setConfig(<span $name</span>, <span $value</span><span ){
        </span><span if</span>(<span isset</span>(<span $this</span>->config[<span $name</span><span ])){
            </span><span $this</span>->config[<span $name</span>] = <span $value</span><span ;
        }
    }
     
    </span><span /*</span><span *
     +----------------------------------------------------------
     * 分页显示输出
     +----------------------------------------------------------
     * @param  $length 分页条长度
     +----------------------------------------------------------
     * @param  $hide 是否适时隐藏上、下一页，比如：当前是第一页，则隐藏上一页
     +----------------------------------------------------------
     </span><span */</span>
    <span function</span> show(<span $length</span>, <span $hide</span> = <span false</span><span ){

        </span><span if</span>(0 == <span $this</span>->records) <span return</span> ''<span ;
        </span><span empty</span>(<span $this</span>->url)? <span $this</span>->url = <span $_SERVER</span>['REQUEST_URI'] : <span null</span><span ;
        </span><span $url</span> = <span $this</span>->url.(<span strpos</span>(<span $this</span>->url,'?')?'':'?').<span $this</span>-><span parameter;
        </span><span $parse</span> = <span parse_url</span>(<span $url</span><span );
         
        </span><span if</span>(<span isset</span>(<span $parse</span>['query'<span ])){
            </span><span parse_str</span>(<span $parse</span>['query'],<span $params</span><span );
            </span><span unset</span>(<span $params</span>[<span $this</span>-><span varPage]);
            </span><span $url</span> = <span $parse</span>['path'].'?'.<span http_build_query</span>(<span $params</span><span );
        }

        </span><span if</span>('mid' == <span $this</span>->style){ <span //</span><span 当前页居中</span>
            <span if</span>(<span $length</span> % 2 != 0<span  ){
                </span><span $midder</span> = <span ceil</span>(<span $length</span> / 2<span );
                </span><span $big_repair</span> = <span $midder</span> - 1 ;<span //</span><span 当上面以进一法取整，则这里为减1，反之为加1</span>
            }<span else</span><span {
                </span><span $big_repair</span> = <span $midder</span> = <span $length</span> / 2<span ;
            }
            </span><span $sml_repair</span> = <span $midder</span>- 1;  <span //</span><span 这是小补丁</span>
            <span $this</span>->startPage = (<span $this</span>->page  + <span $midder</span>) > <span $this</span>->pageMax ? <span $this</span>->pageMax  - <span $length</span> : <span $this</span>->page - <span $sml_repair</span><span ;
            </span><span $this</span>->endPage = (<span $this</span>->page < <span $midder</span>)? <span $length</span> : <span $this</span>->page + <span $big_repair</span><span ;
        }</span><span else</span>{ <span //</span><span 最后一页翻页</span>
            <span $this</span>->startPage = (<span $this</span>->page >= <span $length</span>)? <span $_SESSION</span>['startPage'] : 1<span ;
            </span><span $this</span>->endPage  = <span $this</span>->startPage + <span $length</span> - 1<span ;
             
            </span><span $this</span>->lastPage =  <span isset</span>(<span $_SESSION</span>['lastPage'])? <span $_SESSION</span>['lastPage'] : 1; <span //</span><span 上次的页码</span>
            <span $_SESSION</span>['lastPage'] = <span $this</span>->page;  <span //</span><span 保存当前页</span>
             
            <span if</span>(<span $this</span>->lastPage < <span $this</span>->page){ <span //</span><span 后翻页</span>
                <span if</span>(<span $this</span>->page >= <span $this</span>-><span endPage){
                    </span><span $this</span>->startPage = <span $_SESSION</span>['startPage'] = <span $this</span>-><span page;
                    </span><span $this</span>->endPage = <span $this</span>->startPage + <span $length</span> -1<span ;
                }
            }</span><span elseif</span>(<span $this</span>->lastPage == <span $this</span>->page){<span //</span><span 切换</span>
                <span if</span>(<span $this</span>->page == <span $this</span>-><span endPage){
                    </span><span $this</span>->startPage = <span $_SESSION</span>['startPage'] = <span $this</span>-><span page;
                    </span><span $this</span>->endPage = <span $this</span>->startPage + <span $length</span> -1<span ;
                }</span><span else</span><span {
                    </span><span $this</span>->startPage = <span $_SESSION</span>['startPage'] = <span $this</span>->page - <span $length</span> + 1<span ;
                    </span><span $this</span>->endPage = <span $this</span>->startPage + <span $length</span> -1<span ;
                }
            }</span><span else</span>{<span //</span><span 前翻页</span>
                <span if</span>(<span $this</span>->page == <span $this</span>-><span startPage ){
                    </span><span $this</span>->startPage = <span $_SESSION</span>['startPage'] = <span $this</span>->page - <span $length</span> + 1<span ;
                    </span><span $this</span>->endPage = <span $this</span>->startPage + <span $length</span> -1<span ;
                }
            }
            </span><span //</span><span echo '开始页码:'. $this->startPage.'<br/>';
            //echo '上次页码:'. $this->lastPage.'<br/>';</span>
<span         }
        </span><span //</span><span 修正一下</span>
        <span $this</span>->startPage = <span min</span>(<span $this</span>->pageMax - <span $length</span> + 1, <span $this</span>->startPage); <span //</span><span 最大</span>
        <span $this</span>->startPage = <span max</span>(<span $this</span>->startPage, 1);<span //</span><span 最小为第一页(先求最大，再求最小)</span>
         
        <span $this</span>->endPage = <span $this</span>->startPage + <span $length</span> -1<span ;
        </span><span $this</span>->endPage = <span min</span>(<span $this</span>->pageMax, <span $this</span>->endPage); <span //</span><span 最大为末页</span>
         
        <span $_SESSION</span>['startPage'] = <span $this</span>->startPage; <span //</span><span 修正之后,重新保存
         
        //echo '开始页码:'. $this->startPage.'<br/>';
        //echo '上次页码:'. $this->lastPage.'<br/>';</span>
         
        <span if</span>(<span $this</span>->page <= 1){<span //</span><span 如果已经是首页</span>
            <span $firstPage</span> = '<span>'.<span $this</span>->config['first'].'</span>'<span ;
            </span><span $prevPage</span> = '<span>'.<span $this</span>->config['prev'].'</span>'<span ;
        }</span><span else</span><span {
            </span><span $firstPage</span> = "<span><a href='<span $url</span>&<span $this</span>->varPage=1'>".<span $this</span>->config['first'].'</a>'<span ;
            </span><span $prevPage</span> = "<span><a href='<span $url</span>&<span $this</span>->varPage=<span $this</span>->prevPage'>".<span $this</span>->config['prev'].'</a>'<span ;
        }
        
        </span><span if</span>(<span $this</span>->page >= <span $this</span>->pageMax){ <span //</span><span 如果已经是末页</span>
            <span $nextPage</span> = '<span>'.<span $this</span>->config['next'].'</span>'<span ;
            </span><span $lastPage</span> = '<span>'.<span $this</span>->config['last'].'</span>'<span ;
        }</span><span else</span><span {
            </span><span $lastPage</span> = "<a href='<span $url</span>&<span $this</span>->varPage=<span $this</span>->pageMax'>".<span $this</span>->config['last'].'</a>'<span ;
            </span><span $nextPage</span> = "<a href='<span $url</span>&<span $this</span>->varPage=<span $this</span>->nextPage'>".<span $this</span>->config['next'].'</a>'<span ;
        }
        
        </span><span if</span>(<span $hide</span>){ <span //</span><span 如果是隐藏模式</span>
            (<span $this</span>->nextPage >= <span $this</span>->pageMax)? <span $nextPage</span> = '' : <span null</span><span ;
            (</span><span $this</span>->prevPage < 1)? <span $prevPage</span> = '' : <span null</span><span ;
        }

        </span><span for</span>(<span $i</span> = <span $this</span>->startPage; <span $i</span> <= <span $this</span>->endPage; <span $i</span>++<span ){
            </span><span if</span> (<span $this</span>->page == <span $i</span><span )
                </span><span $linkPage</span> .= "<a class='current' href='<span $url</span>&<span $this</span>->varPage=<span $i</span>'><span $i</span></a>"<span ;
            </span><span else</span>
                <span $linkPage</span> .= "<a href='<span $url</span>&<span $this</span>->varPage=<span $i</span>'><span $i</span></a>"<span ;
        }
        </span><span $search</span> = <span array</span>('%records%','%header%','%page%','%pageMax%','%firstPage%','%prevPage%','%linkPage%','%nextPage%','%lastPage%'<span );
        </span><span $replace</span> = <span array</span>(<span $this</span>->records,<span $this</span>->config['header'],<span $this</span>->page,<span $this</span>->pageMax,<span $firstPage</span>,<span $prevPage</span>,<span $linkPage</span>,<span $nextPage</span>,<span $lastPage</span><span );
        </span><span $pageStr</span> = <span str_replace</span>(<span $search</span>, <span $replace</span>, <span $this</span>->config['theme'<span ]);

        </span><span return</span> <span $pageStr</span><span ;
    }
     
}
</span><span $page</span> = <span new</span> Page(340, 10<span );
</span><span $theme</span> = '%records% %header% %page%/%pageMax% 页  %firstPage%%prevPage%%linkPage%%nextPage%%lastPage%'<span ;
</span><span $page</span>->setConfig('theme',<span $theme</span>); <span //</span><span 可以修改样式，比如：当不要末页是，可以删除 %lastPage%，或者改变位置次序</span>
<span $page</span>->setConfig('last','末页'); <span //</span><span 可自定义文字 ： 'header'='条记录','prev'='上一页','next'='下一页','first'='首页','last'='尾页'</span>
<span $page</span>->url = 'http://localhost/test.php'<span ;
</span><span echo</span> <span $page</span>->show(10<span );

</span>?>
 <style><span 
a</span>,span{ margin:<span 2px 5px;}
</span>.<span current</span>{ color:<span red;}
</span></style>

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