PEAR探奇之PEAR::Pager

　　系统需求：PHP4.3.* /PHP5，PEAR::Pager

　　PEAR::Pager有两种分页显示模式，一是Jumping，二是Sliding。两者有什么区别，我们来看两个例子：

Jumping.php

<?php

require_once 'Pager/Pager.php';

$params = array(
    'mode'       => 'Jumping',
    'perPage'    => 3,
    'delta'      => 5,
    'itemData'   => array('a','b','c','d','e','z','ty','xc','fg','fg','jk','hj','ty','xc','e','z','ty','xc','fg','fg','jk','hj','ty','xc')
);

echo "<BR>当前分页模式：".$params['mode'];
echo "<BR>每页显示数据条数：".$params['perPage'];
echo "<BR>显示页数：".$params['delta'];
echo "<BR>详细数据数组：";
print_r($params['itemData']);

$pager = & Pager::factory($params);
$data  = $pager->getPageData();
$links = $pager->getLinks();

echo "<P>最后效果：";
echo $links['all'];
echo $pager->linkTags;

echo '<P>当前页的数据: ' ;
echo "<pre>";
print_r($data);
echo "</pre>";

echo "其它类方法得到的数据：<P>";
echo 'getCurrentPageID()...: ';
var_dump($pager->getCurrentPageID()); 
echo "<BR>";
echo 'getNextPageID()......: '; 
var_dump($pager->getNextPageID()); 
echo "<BR>";
echo 'getPreviousPageID()..: '; 
var_dump($pager->getPreviousPageID());
echo "<BR>";
echo 'numItems()...........: ';
var_dump($pager->numItems()); 
echo "<BR>";
echo 'numPages()...........: ';
var_dump($pager->numPages());
echo "<BR>";
echo 'isFirstPage()........: ';
var_dump($pager->isFirstPage());
echo "<BR>";
echo 'isLastPage().........: ';
var_dump($pager->isLastPage());
echo "<BR>";
echo 'isLastPageComplete().: ';
var_dump($pager->isLastPageComplete());
echo "<BR>";
echo '$pager->range........: ';
var_dump($pager->range); echo "<BR>";

?>