PEAR探奇之PEAR::Pager_PHP教程

　　在页面上显示大量数据，是WEB项目中很常见的一个作法，但限于屏幕的大小，为了便于用户阅读，我们通常需要将数据分页显示，所以分页功能是大部份项目不可缺少的。PEAR::Pager是一个功能强大的分页类，使用非常方便。

　　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



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


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

echo "

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

echo '

当前页的数据: ' ;
echo "

";<br>
print_r($data);<br>
echo "

";
echo 'getCurrentPageID()...: ';
var_dump($pager->getCurrentPageID());
echo "
";
echo 'getNextPageID()......: ';
var_dump($pager->getNextPageID());
echo "
";
echo 'getPreviousPageID()..: ';
var_dump($pager->getPreviousPageID());
echo "
";
echo 'numItems()...........: ';
var_dump($pager->numItems());
echo "
";
echo 'numPages()...........: ';
var_dump($pager->numPages());
echo "
";
echo 'isFirstPage()........: ';
var_dump($pager->isFirstPage());
echo "
";
echo 'isLastPage().........: ';
var_dump($pager->isLastPage());
echo "
";
echo 'isLastPageComplete().: ';