php结合ajax实现赞、顶、踩功能实例_PHP教程
本次赞功能的效果图:
主页文件(index.php):
header("Content-type:text/html;charset=utf-8");
include "finger_ajax.php";
$sql = "select * from finger_ajax";
$res = mysql_query($sql,$link);
while($row = mysql_fetch_array($res)){
echo "
".$row['title']." \r\n赞一下(".$row['finger'].")
\r\n";}
?>
处理ajax请求及配置信息文件(finger_ajax.php):
/**"赞" 功能 响应ajax请求*/
//配置
$dbHost = "localhost";
$dbUser = "root";
$dbPass = "dddddd";
$dbName = "test";
$dbCharset = "utf8";
$link = mysql_connect($dbHost,$dbUser,$dbPass) or die(mysql_error());
mysql_query("set names ".$dbCharset);
mysql_select_db($dbName);
// End
//接受对应的id
if(!empty($_POST['id'])){
$id = $_POST['id'];
//“赞”加1
$sql = "update finger_ajax set finger=finger+1 where id=$id;";
if(mysql_query($sql,$link)){
echo "ok";
}else{
echo "failed";
}
}
?>
js文件(finger_ajax.js):
//赞 js
function finger(topic_id){
$.post("finger_ajax.php", { "id": topic_id },
function(data){
if(data=="ok"){
alert("感谢您的支持!");
}else{
alert("对不起,失败了!");
}
}, "text");
//获取当前“赞”的次数并加1
var finger = parseInt($(".finger"+topic_id).html())+1;
//更新“赞”的次数
$(".finger"+topic_id).html(finger);
}
数据库代码(finger_ajax.sql):
DROP TABLE IF EXISTS `finger_ajax`;
CREATE TABLE `finger_ajax` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`title` varchar(50) NOT NULL DEFAULT '',
`finger` int(11) NOT NULL DEFAULT '0',
PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of finger_ajax
-- ----------------------------
INSERT INTO `finger_ajax` VALUES ('1', '今天天气还不错哦!去做点什么好呢?', '10');
INSERT INTO `finger_ajax` VALUES ('2', '欢迎来到 www.jb51.net,国庆将至,祝大家国庆节快乐!!', '3');