Pear::Pager分页类简介

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1PLAIN TEXTPHP:<?phprequire_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'> tagsecho$pager->linkTags;//Show data for current page:echo'PAGED DATA: ';print_r($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

PLAIN TEXTPHP:<?phprequire_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

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