作为一个PHP开发人员来说,大概很让人受用的一个东东就是Pear的类库了。我们知道,Pear::Pager是专门处理分页的,而Pear::HTML_AJAX则是Ajax应用的一些类库。但是Pager也不仅仅是只能用于html的分页链接,它已经为比超女还红的Ajax做好了准备,下面看看这两个包如何整合应用。
Pager and Javascript
现在走出第一步,Pager已经能够构建出javascript的链接了,和Ajax整合,理论上应该也是能够实现的,下面是Pager和javascript分页的一个例子:
PLAIN TEXT
PHP:
require_once 'Pager/Pager.php';
$data = range(1, 100); //an array of data to paginate
$pager_params = array(
'mode' => 'Sliding',
'append' => false, //don't append the GET parameters to the url
'path' => '',
'fileName' => 'javascript:revealDiv(%d)', //Pager replaces "%d" with the page number...
'perPage' => 10, //show 10 items per page
'delta' => 5,
'itemData' => $data,
);
$pager = & Pager::factory($pager_params);
$n_pages = $pager->numPages();
$links = $pager->getLinks();
?>
<html>
<head>
<script type="text/javascript" language="javascript">
var n_pages = <?php echo $n_pages ?>;
function revealDiv(n)
{
for (var count = 1; count <= n_pages; count++) {
document.getElementById("page"+count).style.display = 'none';
}
document.getElementById("page"+n).style.display = 'block';
}
</script>
<style type="text/css">
div.page {
background: #FFFF99;
border-top: 1px solid #FFBF99;
border-bottom: 1px solid #FFBF99;
}
</style>
</head>
<body>
<h1>PEAR::Pager example with JavaScript</h1>
<?php echo $links['pages']; ?>
<hr />
<?php
for ($i=1; $i <= $n_pages; ++$i) {
echo '<div class="page" id="page'.$i.'">';
echo '<h2>Page '.$i.'</h2>';
foreach ($pager->getPageData($i) as $item) {
echo 'Item '.$item.'<br />';
}
echo '</div>';
}
?>
<hr />
<script type="text/javascript" language="javascript">
revealDiv(1);
</script>
</body>
</html>
例子中把分页的所有数据放入一个div标签,定义了两个比较重要的参数就是path(为空)和fileName,fileName原本应该是链接的文件名,但是这里用javascript替换了。
Ajax上阵
这个例子包括三个文件page.html,server.php,testdata.php
page.html
用动态javascript--server.php来处理数据,调用HTML_AJAX.replace('target', 'testdata.php')来替换id为target这个div的内容。
PLAIN TEXT
PHP:
<html>
<body>
<h1>PEAR::Pager example with AJAX</h1>
<script type="text/javascript" src="server.php?client=all"></script>
<div id="target">I'm the target</div>
<script type="text/javascript">
HTML_AJAX.replace('target', 'testdata.php');
</script>
</body>
</html>
testdata.php
这是个很简单的php程序,取到分页数据并输出html
PLAIN TEXT
PHP:
<?php
require_once 'Pager/Pager.php';
$data = range(1, 100); //an array of data to paginate
$pager_params = array(
'mode' => 'Sliding',
'append' => false, //don't append the GET parameters to the url
'path' => '',
'fileName' => 'javascript:HTML_AJAX.replace(\'target\',\'testdata.php?pageID=%d\');', //Pager replaces "%d" with the page number...
'perPage' => 10, //show 10 items per page
'delta' => 1,
'itemData' => $data,
);
$pager = & Pager::factory($pager_params);
$n_pages = $pager->numPages();
$links = $pager->getLinks();
echo '<p>This container is loaded with an AJAX call</p>';
echo '<p><span class="datetime">DateTime: '. date('Y-m-d H:i:s') .'</span></p>';
echo '<h3>Page '. $pager->getCurrentPageId() .'</h3>';
foreach ($pager->getPageData() as $item) {
echo 'Item '. $item .'<br />';
}
echo '<hr />'.$pager->links;
?>
最后,贴上幕后工作者server.php的代码
用HTML_AJAX_Server来处理ajax这些烦心事吧
PLAIN TEXT
PHP:
<?php
include 'HTML/AJAX/Server.php';
$server = new HTML_AJAX_Server();
$server->handleRequest();
?>
web 2.0, Ajax的趋势图
时下的web 2.0和Ajax概念正是如火如荼,且不论Ajax这东东到底是不是炒作的产物,就实际应用来说,Ajax在某些场合的确是顶好用而且看上去挺酷