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ThinkPHP分页类的使用相关有关问题

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Jun 13, 2016 pm 12:28 PM

gtpagethis

ThinkPHP分页类的使用相关问题

ThinkPHP3.2.3<span style="color: #000000;">Page</span>.<span style="color: #0000ff;">class</span>.<span style="color: #000000;">php文件源码</span><span style="color: #000000;">php</span><span style="color: #008000;">//</span><span style="color: #008000;"> +----------------------------------------------------------------------// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]// +----------------------------------------------------------------------// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.// +----------------------------------------------------------------------// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )// +----------------------------------------------------------------------// | Author: 麦当苗儿  <http:>// +----------------------------------------------------------------------</http:></span><span style="color: #000000;">namespace Think;</span><span style="color: #0000ff;">class</span><span style="color: #000000;"> Page{    </span><span style="color: #0000ff;">public</span> <span style="color: #800080;">$firstRow</span>; <span style="color: #008000;">//</span><span style="color: #008000;"> 起始行数</span>    <span style="color: #0000ff;">public</span> <span style="color: #800080;">$listRows</span>; <span style="color: #008000;">//</span><span style="color: #008000;"> 列表每页显示行数</span>    <span style="color: #0000ff;">public</span> <span style="color: #800080;">$parameter</span>; <span style="color: #008000;">//</span><span style="color: #008000;"> 分页跳转时要带的参数</span>    <span style="color: #0000ff;">public</span> <span style="color: #800080;">$totalRows</span>; <span style="color: #008000;">//</span><span style="color: #008000;"> 总行数</span>    <span style="color: #0000ff;">public</span> <span style="color: #800080;">$totalPages</span>; <span style="color: #008000;">//</span><span style="color: #008000;"> 分页总页面数</span>    <span style="color: #0000ff;">public</span> <span style="color: #800080;">$rollPage</span>   = 11;<span style="color: #008000;">//</span><span style="color: #008000;"> 分页栏每页显示的页数</span>    <span style="color: #0000ff;">public</span> <span style="color: #800080;">$lastSuffix</span> = <span style="color: #0000ff;">true</span>; <span style="color: #008000;">//</span><span style="color: #008000;"> 最后一页是否显示总页数</span>    <span style="color: #0000ff;">private</span> <span style="color: #800080;">$p</span>       = 'p'; <span style="color: #008000;">//</span><span style="color: #008000;">分页参数名</span>    <span style="color: #0000ff;">private</span> <span style="color: #800080;">$url</span>     = ''; <span style="color: #008000;">//</span><span style="color: #008000;">当前链接URL</span>    <span style="color: #0000ff;">private</span> <span style="color: #800080;">$nowPage</span> = 1<span style="color: #000000;">;    </span><span style="color: #008000;">//</span><span style="color: #008000;"> 分页显示定制</span>    <span style="color: #0000ff;">private</span> <span style="color: #800080;">$config</span>  = <span style="color: #0000ff;">array</span><span style="color: #000000;">(        </span>'header' => '<span class="rows">共 %TOTAL_ROW% 条记录</span>',        'prev'   => ' '>>',        'first'  => '1...',        'last'   => '...%TOTAL_PAGE%',        'theme'  => '%FIRST% %UP_PAGE% %LINK_PAGE% %DOWN_PAGE% %END%',<span style="color: #000000;">    );    </span><span style="color: #008000;">/*</span><span style="color: #008000;">*     * 架构函数     * @param array $totalRows  总的记录数     * @param array $listRows  每页显示记录数     * @param array $parameter  分页跳转的参数     </span><span style="color: #008000;">*/</span>    <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span> __construct(<span style="color: #800080;">$totalRows</span>, <span style="color: #800080;">$listRows</span>=20, <span style="color: #800080;">$parameter</span> = <span style="color: #0000ff;">array</span><span style="color: #000000;">()) {        C(</span>'VAR_PAGE') && <span style="color: #800080;">$this</span>->p = C('VAR_PAGE'); <span style="color: #008000;">//</span><span style="color: #008000;">设置分页参数名称</span>        <span style="color: #008000;">/*</span><span style="color: #008000;"> 基础设置 </span><span style="color: #008000;">*/</span>        <span style="color: #800080;">$this</span>->totalRows  = <span style="color: #800080;">$totalRows</span>; <span style="color: #008000;">//</span><span style="color: #008000;">设置总记录数</span>        <span style="color: #800080;">$this</span>->listRows   = <span style="color: #800080;">$listRows</span>;  <span style="color: #008000;">//</span><span style="color: #008000;">设置每页显示行数</span>        <span style="color: #800080;">$this</span>->parameter  = <span style="color: #0000ff;">empty</span>(<span style="color: #800080;">$parameter</span>) ? <span style="color: #800080;">$_GET</span> : <span style="color: #800080;">$parameter</span><span style="color: #000000;">;        </span><span style="color: #800080;">$this</span>->nowPage    = <span style="color: #0000ff;">empty</span>(<span style="color: #800080;">$_GET</span>[<span style="color: #800080;">$this</span>->p]) ? 1 : <span style="color: #008080;">intval</span>(<span style="color: #800080;">$_GET</span>[<span style="color: #800080;">$this</span>-><span style="color: #000000;">p]);        </span><span style="color: #800080;">$this</span>->nowPage    = <span style="color: #800080;">$this</span>->nowPage>0 ? <span style="color: #800080;">$this</span>->nowPage : 1<span style="color: #000000;">;        </span><span style="color: #800080;">$this</span>->firstRow   = <span style="color: #800080;">$this</span>->listRows * (<span style="color: #800080;">$this</span>->nowPage - 1<span style="color: #000000;">);    }    </span><span style="color: #008000;">/*</span><span style="color: #008000;">*     * 定制分页链接设置     * @param string $name  设置名称     * @param string $value 设置值     </span><span style="color: #008000;">*/</span>    <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span> setConfig(<span style="color: #800080;">$name</span>,<span style="color: #800080;">$value</span><span style="color: #000000;">) {        </span><span style="color: #0000ff;">if</span>(<span style="color: #0000ff;">isset</span>(<span style="color: #800080;">$this</span>->config[<span style="color: #800080;">$name</span><span style="color: #000000;">])) {            </span><span style="color: #800080;">$this</span>->config[<span style="color: #800080;">$name</span>] = <span style="color: #800080;">$value</span><span style="color: #000000;">;        }    }    </span><span style="color: #008000;">/*</span><span style="color: #008000;">*     * 生成链接URL     * @param  integer $page 页码     * @return string     </span><span style="color: #008000;">*/</span>    <span style="color: #0000ff;">private</span> <span style="color: #0000ff;">function</span> url(<span style="color: #800080;">$page</span><span style="color: #000000;">){        </span><span style="color: #0000ff;">return</span> <span style="color: #008080;">str_replace</span>(<span style="color: #008080;">urlencode</span>('[PAGE]'), <span style="color: #800080;">$page</span>, <span style="color: #800080;">$this</span>-><span style="color: #000000;">url);    }    </span><span style="color: #008000;">/*</span><span style="color: #008000;">*     * 组装分页链接     * @return string     </span><span style="color: #008000;">*/</span>    <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> show() {        </span><span style="color: #0000ff;">if</span>(0 == <span style="color: #800080;">$this</span>->totalRows) <span style="color: #0000ff;">return</span> ''<span style="color: #000000;">;        </span><span style="color: #008000;">/*</span><span style="color: #008000;"> 生成URL </span><span style="color: #008000;">*/</span>        <span style="color: #800080;">$this</span>->parameter[<span style="color: #800080;">$this</span>->p] = '[PAGE]'<span style="color: #000000;">;        </span><span style="color: #800080;">$this</span>->url = U(ACTION_NAME, <span style="color: #800080;">$this</span>-><span style="color: #000000;">parameter);        </span><span style="color: #008000;">/*</span><span style="color: #008000;"> 计算分页信息 </span><span style="color: #008000;">*/</span>        <span style="color: #800080;">$this</span>->totalPages = <span style="color: #008080;">ceil</span>(<span style="color: #800080;">$this</span>->totalRows / <span style="color: #800080;">$this</span>->listRows); <span style="color: #008000;">//</span><span style="color: #008000;">总页数</span>        <span style="color: #0000ff;">if</span>(!<span style="color: #0000ff;">empty</span>(<span style="color: #800080;">$this</span>->totalPages) && <span style="color: #800080;">$this</span>->nowPage > <span style="color: #800080;">$this</span>-><span style="color: #000000;">totalPages) {            </span><span style="color: #800080;">$this</span>->nowPage = <span style="color: #800080;">$this</span>-><span style="color: #000000;">totalPages;        }        </span><span style="color: #008000;">/*</span><span style="color: #008000;"> 计算分页临时变量 </span><span style="color: #008000;">*/</span>        <span style="color: #800080;">$now_cool_page</span>      = <span style="color: #800080;">$this</span>->rollPage/2<span style="color: #000000;">;        </span><span style="color: #800080;">$now_cool_page_ceil</span> = <span style="color: #008080;">ceil</span>(<span style="color: #800080;">$now_cool_page</span><span style="color: #000000;">);        </span><span style="color: #800080;">$this</span>->lastSuffix && <span style="color: #800080;">$this</span>->config['last'] = <span style="color: #800080;">$this</span>-><span style="color: #000000;">totalPages;        </span><span style="color: #008000;">//</span><span style="color: #008000;">上一页</span>        <span style="color: #800080;">$up_row</span>  = <span style="color: #800080;">$this</span>->nowPage - 1<span style="color: #000000;">;        </span><span style="color: #800080;">$up_page</span> = <span style="color: #800080;">$up_row</span> > 0 ? '<a class="prev" href="'%20.%20<span%20style=" color:>$this->url(<span style="color: #800080;">$up_row</span>) . '">' . <span style="color: #800080;">$this</span>->config['prev'] . '</a>' : ''<span style="color: #000000;">;        </span><span style="color: #008000;">//</span><span style="color: #008000;">下一页</span>        <span style="color: #800080;">$down_row</span>  = <span style="color: #800080;">$this</span>->nowPage + 1<span style="color: #000000;">;        </span><span style="color: #800080;">$down_page</span> = (<span style="color: #800080;">$down_row</span> $this->totalPages) ? '<a class="next" href="'%20.%20<span%20style=" color:>$this->url(<span style="color: #800080;">$down_row</span>) . '">' . <span style="color: #800080;">$this</span>->config['next'] . '</a>' : ''<span style="color: #000000;">;        </span><span style="color: #008000;">//</span><span style="color: #008000;">第一页</span>        <span style="color: #800080;">$the_first</span> = ''<span style="color: #000000;">;        </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$this</span>->totalPages > <span style="color: #800080;">$this</span>->rollPage && (<span style="color: #800080;">$this</span>->nowPage - <span style="color: #800080;">$now_cool_page</span>) >= 1<span style="color: #000000;">){            </span><span style="color: #800080;">$the_first</span> = '<a class="first" href="'%20.%20<span%20style=" color:>$this->url(1) . '">' . <span style="color: #800080;">$this</span>->config['first'] . '</a>'<span style="color: #000000;">;        }        </span><span style="color: #008000;">//</span><span style="color: #008000;">最后一页</span>        <span style="color: #800080;">$the_end</span> = ''<span style="color: #000000;">;        </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$this</span>->totalPages > <span style="color: #800080;">$this</span>->rollPage && (<span style="color: #800080;">$this</span>->nowPage + <span style="color: #800080;">$now_cool_page</span>) $this-><span style="color: #000000;">totalPages){            </span><span style="color: #800080;">$the_end</span> = '<a class="end" href="'%20.%20<span%20style=" color:>$this->url(<span style="color: #800080;">$this</span>->totalPages) . '">' . <span style="color: #800080;">$this</span>->config['last'] . '</a>'<span style="color: #000000;">;        }        </span><span style="color: #008000;">//</span><span style="color: #008000;">数字连接</span>        <span style="color: #800080;">$link_page</span> = ""<span style="color: #000000;">;        </span><span style="color: #0000ff;">for</span>(<span style="color: #800080;">$i</span> = 1; <span style="color: #800080;">$i</span> $this->rollPage; <span style="color: #800080;">$i</span>++<span style="color: #000000;">){            </span><span style="color: #0000ff;">if</span>((<span style="color: #800080;">$this</span>->nowPage - <span style="color: #800080;">$now_cool_page</span>)  ){                <span style="color: #800080;">$page</span> = <span style="color: #800080;">$i</span><span style="color: #000000;">;            }</span><span style="color: #0000ff;">elseif</span>((<span style="color: #800080;">$this</span>->nowPage + <span style="color: #800080;">$now_cool_page</span> - 1) >= <span style="color: #800080;">$this</span>-><span style="color: #000000;">totalPages){                </span><span style="color: #800080;">$page</span> = <span style="color: #800080;">$this</span>->totalPages - <span style="color: #800080;">$this</span>->rollPage + <span style="color: #800080;">$i</span><span style="color: #000000;">;            }</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{                </span><span style="color: #800080;">$page</span> = <span style="color: #800080;">$this</span>->nowPage - <span style="color: #800080;">$now_cool_page_ceil</span> + <span style="color: #800080;">$i</span><span style="color: #000000;">;            }            </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$page</span> > 0 && <span style="color: #800080;">$page</span> != <span style="color: #800080;">$this</span>-><span style="color: #000000;">nowPage){                </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$page</span> $this-><span style="color: #000000;">totalPages){                    </span><span style="color: #800080;">$link_page</span> .= '<a class="num" href="'%20.%20<span%20style=" color:>$this->url(<span style="color: #800080;">$page</span>) . '">' . <span style="color: #800080;">$page</span> . '</a>'<span style="color: #000000;">;                }</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{                    </span><span style="color: #0000ff;">break</span><span style="color: #000000;">;                }            }</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{                </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$page</span> > 0 && <span style="color: #800080;">$this</span>->totalPages != 1<span style="color: #000000;">){                    </span><span style="color: #800080;">$link_page</span> .= '<span class="current">' . <span style="color: #800080;">$page</span> . '</span>'<span style="color: #000000;">;                }            }        }        </span><span style="color: #008000;">//</span><span style="color: #008000;">替换分页内容</span>        <span style="color: #800080;">$page_str</span> = <span style="color: #008080;">str_replace</span><span style="color: #000000;">(            </span><span style="color: #0000ff;">array</span>('%HEADER%', '%NOW_PAGE%', '%UP_PAGE%', '%DOWN_PAGE%', '%FIRST%', '%LINK_PAGE%', '%END%', '%TOTAL_ROW%', '%TOTAL_PAGE%'),            <span style="color: #0000ff;">array</span>(<span style="color: #800080;">$this</span>->config['header'], <span style="color: #800080;">$this</span>->nowPage, <span style="color: #800080;">$up_page</span>, <span style="color: #800080;">$down_page</span>, <span style="color: #800080;">$the_first</span>, <span style="color: #800080;">$link_page</span>, <span style="color: #800080;">$the_end</span>, <span style="color: #800080;">$this</span>->totalRows, <span style="color: #800080;">$this</span>->totalPages),            <span style="color: #800080;">$this</span>->config['theme'<span style="color: #000000;">]);        </span><span style="color: #0000ff;">return</span> "<div>{<span style="color: #800080;">$page_str</span>}</div>"<span style="color: #000000;">;    }}</span>

通常在数据查询后都会对数据集进行分页操作，ThinkPHP也提供了分页类来对数据分页提供支持。下面是数据分页的两种示例。

第一种：利用Page类和limit方法

<span style="color: #800080;">$User</span> = M('User'); <span style="color: #008000;">//</span><span style="color: #008000;"> 实例化User对象</span><span style="color: #800080;">$count</span>      = <span style="color: #800080;">$User</span>->where('status=1')-><span style="color: #008080;">count</span>();<span style="color: #008000;">//</span><span style="color: #008000;"> 查询满足要求的总记录数</span><span style="color: #800080;">$Page</span>       = <span style="color: #0000ff;">new</span> \Think\Page(<span style="color: #800080;">$count</span>,25);<span style="color: #008000;">//</span><span style="color: #008000;"> 实例化分页类 传入总记录数和每页显示的记录数(25)</span><span style="color: #800080;">$show</span>       = <span style="color: #800080;">$Page</span>->show();<span style="color: #008000;">//</span><span style="color: #008000;"> 分页显示输出// 进行分页数据查询 注意limit方法的参数要使用Page类的属性</span><span style="color: #800080;">$list</span> = <span style="color: #800080;">$User</span>->where('status=1')->order('create_time')->limit(<span style="color: #800080;">$Page</span>->firstRow.','.<span style="color: #800080;">$Page</span>->listRows)-><span style="color: #000000;">select();</span><span style="color: #800080;">$this</span>->assign('list',<span style="color: #800080;">$list</span>);<span style="color: #008000;">//</span><span style="color: #008000;"> 赋值数据集</span><span style="color: #800080;">$this</span>->assign('page',<span style="color: #800080;">$show</span>);<span style="color: #008000;">//</span><span style="color: #008000;"> 赋值分页输出</span><span style="color: #800080;">$this</span>->display(); <span style="color: #008000;">//</span><span style="color: #008000;"> 输出模板</span>

第二种：分页类和page方法的实现

<span style="color: #800080;">$User</span> = M('User'); <span style="color: #008000;">//</span><span style="color: #008000;"> 实例化User对象// 进行分页数据查询 注意page方法的参数的前面部分是当前的页数使用 $_GET[p]获取</span><span style="color: #800080;">$list</span> = <span style="color: #800080;">$User</span>->where('status=1')->order('create_time')->page(<span style="color: #800080;">$_GET</span>['p'].',25')-><span style="color: #000000;">select();</span><span style="color: #800080;">$this</span>->assign('list',<span style="color: #800080;">$list</span>);<span style="color: #008000;">//</span><span style="color: #008000;"> 赋值数据集</span><span style="color: #800080;">$count</span>      = <span style="color: #800080;">$User</span>->where('status=1')-><span style="color: #008080;">count</span>();<span style="color: #008000;">//</span><span style="color: #008000;"> 查询满足要求的总记录数</span><span style="color: #800080;">$Page</span>       = <span style="color: #0000ff;">new</span> \Think\Page(<span style="color: #800080;">$count</span>,25);<span style="color: #008000;">//</span><span style="color: #008000;"> 实例化分页类 传入总记录数和每页显示的记录数</span><span style="color: #800080;">$show</span>       = <span style="color: #800080;">$Page</span>->show();<span style="color: #008000;">//</span><span style="color: #008000;"> 分页显示输出</span><span style="color: #800080;">$this</span>->assign('page',<span style="color: #800080;">$show</span>);<span style="color: #008000;">//</span><span style="color: #008000;"> 赋值分页输出</span><span style="color: #800080;">$this</span>->display(); <span style="color: #008000;">//</span><span style="color: #008000;"> 输出模板</span>

带入查询条件
如果是POST方式查询，如何确保分页之后能够保持原先的查询条件呢，我们可以给分页类传入参数，方法是给分页类的parameter属性赋值

<span style="color: #800080;">$count</span>      = <span style="color: #800080;">$User</span>->where(<span style="color: #800080;">$map</span>)-><span style="color: #008080;">count</span>();<span style="color: #008000;">//</span><span style="color: #008000;"> 查询满足要求的总记录数</span><span style="color: #800080;">$Page</span>       = <span style="color: #0000ff;">new</span> \Think\Page(<span style="color: #800080;">$count</span>,25);<span style="color: #008000;">//</span><span style="color: #008000;"> 实例化分页类 传入总记录数和每页显示的记录数//分页跳转的时候保证查询条件</span><span style="color: #0000ff;">foreach</span>(<span style="color: #800080;">$map</span> <span style="color: #0000ff;">as</span> <span style="color: #800080;">$key</span>=><span style="color: #800080;">$val</span><span style="color: #000000;">) {    </span><span style="color: #800080;">$Page</span>->parameter[<span style="color: #800080;">$key</span>]   =   <span style="color: #008080;">urlencode</span>(<span style="color: #800080;">$val</span><span style="color: #000000;">);}</span><span style="color: #800080;">$show</span>       = <span style="color: #800080;">$Page</span>->show();<span style="color: #008000;">//</span><span style="color: #008000;"> 分页显示输出</span>

分页样式定制
我们可以对输出的分页样式进行定制，分页类Page提供了一个setConfig方法来修改默认的一些设置。例如：

<span style="color: #800080;">$page</span>->setConfig('header','

共%TOTAL_ROW%条记录第%NOW_PAGE%页/共%TOTAL_PAGE%页

'); $page->setConfig('prev', '上一页'); $page->setConfig('next', '下一页'); $page->setConfig('first', '首页'); $page->setConfig('last', '尾页'); $page->setConfig('theme', '%FIRST% %UP_PAGE% %LINK_PAGE% %DOWN_PAGE% %END% %HEADER%');

setConfig方法支持的属性包括：
header：头部描述信息，默认值 “共 %TOTAL_ROW% 条记录”
next：下一页描述信息，默认值 “>>”
first：第一页描述信息，默认值 “1…”
last：最后一页描述信息，默认值 “…%TOTAL_PAGE%”
theme ：分页主题描述信息，包括了上面所有元素的组合，设置该属性可以改变分页的各个单元的显示位置，默认值是 “%FIRST% %UP_PAGE% %LINK_PAGE% %DOWN_PAGE% %END%”

其中，显示位置的对应的关系为：
位置说明
%FIRST% 表示第一页的链接显示
%UP_PAGE% 表示上一页的链接显示
%LINK_PAGE% 表示分页的链接显示
%DOWN_PAGE% 表示下一页的链接显示
%END% 表示最后一页的链接显示
除了改变显示信息外，你还可以使用样式来定义分页的显示效果。这些样式class包括：first（第一页）、prev（上一页）、next（下一页）、end（最后一页）、num（其他页的数字）、current（当前页）。

ThinkPHP系统分页类写的已经很完善只要花几分钟时间研究一下源代码即可，官方注释也很清晰。这里注解一下使用中的问题。系统默认设置了

thinkphp分页

<code class="hljs cs has-numbering"><span class="hljs-keyword">public $rollPage   = <span class="hljs-number">11;<span class="hljs-comment">// 分页栏每页显示的页数<span class="hljs-keyword">public $lastSuffix = <span class="hljs-keyword">true; <span class="hljs-comment">// 最后一页是否显示总页数</span></span></span></span></span></span></code><br><br>

　　一开始看注释还不是很清楚，其实第一个参数是控制显示多少页数，如果默认显示11个页码一般太长，个人喜欢设置为5，当然修改这些参数不要在系统源文件中修改，而是在使用的时候设置$page->rollPage=5即可。

　　而第二个参数就比较坑人了，我们在个性化分页显示的时候通常会采用setConfig('last','尾页')； 用来设置最后一页显示为“尾页”，但是在show方法中可以看到tp在$this->lastSuffix 为真的时候重置该$this->config['last']的值为总页数这样导致无论你怎么设置最后一业都显示为数字。也不知道官方为什么这么设置，解决办法依然是重新设置$page->lastSuffix = false; 即可。
分页类

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