Pear的Pager分頁(yè)類是一個(gè)很好用的php分頁(yè)類,擴(kuò)展性很強(qiáng),能夠適應(yīng)各種分頁(yè)情況的需求,至少我在幾年間大大小小的項(xiàng)目里,基本上沒(méi)有為分頁(yè)額外寫(xiě)過(guò)代碼,全部都是用的Pager,足見(jiàn)Pager的可用性之強(qiáng).下面用代碼來(lái)看看它的使用范例:

例子1
PLAIN TEXT
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|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,只要調(diào)整$param數(shù)組的參數(shù),就可以應(yīng)付很多種分頁(yè)情況了.代碼中的$links數(shù)組包含了一些鏈接,如上一頁(yè)/頁(yè)碼/下一頁(yè)/第一頁(yè)/末頁(yè)/全部.

例2
如今許多網(wǎng)站為了SEO,把動(dòng)態(tài)頁(yè)使用rewrite規(guī)則偽造成靜態(tài)頁(yè)的形式,例如下面這個(gè).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]

即使在這種情況下,Pager分頁(yè)仍然有辦法工作,見(jiàn)下面的code

PLAIN TEXT
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();
?>
通過(guò)配置$param,就能夠把鏈接 "/articles/march/art15.html"對(duì)應(yīng)到鏈接"/article.php?num=15&month=march" ,比較靈活的表現(xiàn)

擴(kuò)展性
Pager類的擴(kuò)展性,平心而論,也是不錯(cuò)的.比如以前寫(xiě)的path方式的分頁(yè)類 - Pager::Pathing(),這個(gè)方法就是從Pager上擴(kuò)展而來(lái),滿足了當(dāng)時(shí)的需求.

作者:volcano發(fā)表于9月 22, 2006 at 7:16 am

版權(quán)信息:可以任意轉(zhuǎn)載, 轉(zhuǎn)載時(shí)請(qǐng)務(wù)必以超鏈接形式標(biāo)明文章原始出處和作者信息及此聲明

永久鏈接 - http://www.ooso.net/index.php/archives/250