html代码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>Document</title>
<script src="/ajax/jquery-1.11.2.min.js" type="text/javascript"></script>
<script src="/ajax/loadNews.js" type="text/javascript"></script>
<style type="text/css">
li{
height: 40px;
line-height: 40px;
}
</style>
</head>
<body>
<div id="html"></div>
<div><button id="click">点击加载更多</button></div>
</body>
</html>JS代码
(function ($) {
$.load_news = function(initdata, ajax_offset){
window.ajax_offset = ajax_offset;
var ajaxutl = '/ajax/result.php';
var init_data = {
limit : 0,
offset : window.ajax_offset,
tbname : '',
classid : 0,
order : '',
dom : '',
click_dom : ''
}
init_data = $.extend({}, init_data, initdata);
var result_lang = {
data_0 : '<font color="red" size="+1">暂无数据</font>',
tbname_not : '没有此数据表'
}
$.post(
ajaxutl,
init_data,
function(data){
var data = data;
if(data.status=='data_0')
{
// 没有数据了~~~~
$(init_data.dom).append(result_lang[data.status]);
// 移除click
$(init_data.click_dom).remove();
// 设置按钮
//$(init_data.click_dom).attr('disabled', 'disabled');
return false;
}
$(init_data.dom).append(data.html);
window.ajax_offset =data.offset;
},
'json'
);
}
})(jQuery);
$(function(){
$("#click").click(function(){
$.load_news({
limit : 20, // 每次查询多少条
tbname : 'news', // 数据表名称
classid : 3, // 栏目ID
order : 'desc', // 排序
dom : '#html', // 向哪个DOM节点中插入数据 ID请填写# class填写. 例如<div id="html"> 填写 #html
click_dom : '#click' // 触发事件的DOM
},window.ajax_offset);
})
})php代码
<?php
include '../e/class/connect.php'; // 数据库配置文件与公共函数文件
include '../e/class/db_sql.php'; // 数据库操作文件
include '../e/data/dbcache/class1.php'; // 栏目缓存文件
$link = db_connect(); // 链接数据库
$empire = new mysqlquery(); // 实例化数据库操作类
$p = $_POST; // 简写post
$_POST = null; // 释放post
$filter = 'RepPostVar'; // 过滤非法数据
$tbname = $filter($p['tbname']); // 数据表名
// 判断表是否存在
if( !$tbname || in_array($tbname, $etable_r) )
{
die( json_encode( array('status'=>'tbname_not') ) );
}
// 栏目ID
$classid = (int) $p['classid'];
// order
$order = $filter($p['order']);
// 查询偏移量
$offset = (int) $p['offset'];
if( $order == 'desc' && $offset != 0 )
{
$where_offset = ' and id < '.$offset;
}else
{
$where_offset = '';
}
if($order == 'asc')
{
$where_offset = ' and id > '.$offset;
}
$where = ' WHERE 1';
$where .= $classid?' AND `classid` = '.$classid:'';
$where .= $where_offset;
$order = 'ORDER BY id '.$order;
$limit = (int) $p['limit'];
$limit = 'LIMIT '.$limit;
$sql = "SELECT {$maxid}id,classid,newspath,filename,groupid,titleurl,title FROM `{$dbtbpre}ecms_{$tbname}` {$where} {$order} {$limit}";
$num=$empire->num($sql);
if($num<1){
die( json_encode( array('status'=>'data_0', 'sql'=>$sql) ) );
}
$query = $empire->query($sql);
$last = 0;
$html = '';
while($r=$empire->fetch($query)){
$last = $r['id'];
$url = sys_ReturnBqTitleLink($r);
$html.= <<<HTML_LIST
<li>id --- $r[id]<a href="{$url}">$r[title]</a></li>
HTML_LIST;
}
die( json_encode( array('status'=>'ok', 'html'=>$html, 'offset'=>$last, 'sql'=>$sql) ) );
?>
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