Pear的Pager分页类是一个很好用的php分页类,扩展性很强,能够适应各种分页情况的需求,至少我在几年间大大小小的项目里,基本上没有为分页额外写过代码,全部都是用的Pager,足见Pager的可用性之强.下面用代码来看看它的使用范例:
例子1
PHP:
- <?php
- require_once'Pager/Pager.php';
- $params=array(
- 'mode' =>'Jumping',
- 'perPage' =>3,
- 'delta' =>2,
- 'itemData' =>array('a','b','c','d','e',[...omissis...],'z')
- );
- $pager= & Pager::factory($params);
- $data =$pager->getPageData();
- $links=$pager->getLinks();
- //$links is an ordered+associative array with 'back'/'pages'/'next'/'first'/'last'/'all' links
- //NB: $links['all'] is the same as $pager->links;
- //echo links to other pages:
- echo$links['all'];
- //Pager can also generate <link rel="first|prev|next|last"> tags
- echo$pager->linkTags;
- //Show data for current page:
- echo'PAGED DATA: ';print_r($data);
- //Results from methods:
- echo'getCurrentPageID()...: ';var_dump($pager->getCurrentPageID());
- echo'getNextPageID()......: ';var_dump($pager->getNextPageID());
- echo'getPreviousPageID()..: ';var_dump($pager->getPreviousPageID());
- echo'numItems()...........: ';var_dump($pager->numItems());
- echo'numPages()...........: ';var_dump($pager->numPages());
- echo'isFirstPage()........: ';var_dump($pager->isFirstPage());
- echo'isLastPage().........: ';var_dump($pager->isLastPage());
- echo'isLastPageComplete().: ';var_dump($pager->isLastPageComplete());
- echo'$pager->range........: ';var_dump($pager->range);
- ?>
Pager的使用,只要调整$param数组的参数,就可以应付很多种分页情况了.代码中的$links数组包含了一些链接,如上一页/页码/下一页/第一页/末页/全部.
例2
如今许多网站为了SEO,把动态页使用rewrite规则伪造成静态页的形式,例如下面这个.htaccess配置:
RewriteEngine on
#Options FollowSymlinks
RewriteBase /
RewriteRule ^articles/([a-z]{1,12})/art([0-9]{1,4})\.html$
/article.php?num=$2&month=$1 [L]
即使在这种情况下,Pager分页仍然有办法工作,见下面的code
PHP:
- <?php
- require_once'Pager/Pager.php';
- //first pager
- $params1=array(
- 'perPage' =>3,
- 'urlVar' => pageID_articles, //1st identifier
- 'itemData' =>$someArray
- );
- $pager1= & Pager::factory($params1);
- $data1 =$pager1->getPageData();
- $links1=$pager1->getLinks();
- //second pager
- $params2=array(
- 'perPage' =>8,
- 'urlVar' => pageID_news, //2nd identifier
- 'itemData' =>$someOtherArray
- );
- $pager2= & Pager::factory($params2);
- $data2 =$pager2->getPageData();
- $links2=$pager2->getLinks();
- ?>
通过配置$param,就能够把链接 "/articles/march/art15.html"对应到链接"/article.php?num=15&month=march" ,比较灵活的表现
扩展性
Pager类的扩展性,平心而论,也是不错的.比如以前写的path方式的分页类 - Pager::Pathing(),这个方法就是从Pager上扩展而来,满足了当时的需求.
作者:volcano发表于9月 22, 2006 at 7:16 am
