jQuery+PHP实现购物商城常用的星级评分效果,我们在商城平台购买商品后,会有个评分功能,本实例就来说说实现方法。
首先我们在.rate里面加入显示的灰星星p#big_rate、亮星星p#big_rate_up、分数span#s及span#g和提示信息p#my_rate。
接着我们写一个获取评分的方法get_rate() :
function get_rate(rate) { rate = rate.toString(); var s; var g; $(#g).show(); if (rate.length >= 3) { s = 10; g = 0; $(#g).hide(); } else if (rate == 0) { s = 0; g = 0; } else { s = rate.substr(0, 1); g = rate.substr(1, 1); } $(#s).text(s); $(#g).text(. + g); $(.big_rate_up).animate({ width: (parseInt(s) + parseInt(g) / 10) * 14, height: 26 }, 1000); $(.big_rate span).each(function() { $(this).mouseover(function() { $(.big_rate_up).width($(this).attr(rate) * 14); $(#s).text($(this).attr(rate)); $(#g).text(); }).click(function() { var score = $(this).attr(rate); $(#my_rate).html(您的评分:<span> + score + </span>); $.ajax({ type: POST, url: ajax.php, data: score= + score, success: function(msg) { //alert(msg); if (msg == 1) { $(#my_rate).html(<span>您已经评过分了!</span>); } else if (msg == 2) { $(#my_rate).html(<span>您评过分了!</span>); } else { get_rate(msg); } } }); }) }) $(.big_rate).mouseout(function() { $(#s).text(s); $(#g).text(. + g); $(.big_rate_up).width((parseInt(s) + parseInt(g) / 10) * 14); }) }
然后直接调用该方法即可:
get_rate(<?php echo $aver; ?>);
ajax.php接收前端发送过来的分数值,通过cookie判断用户IP和评分时间,防止重复评分。
$score = $_POST['score']; if (isset($score)) { $cookiestr = getip(); $time = time(); if (isset($_COOKIE['person']) && $_COOKIE['person'] == $cookiestr) { echo 1; } elseif (isset($_COOKIE['rate_time']) && ($time - intval($_COOKIE['rate_time'])) < 60) { echo 2; } else { $query = mysql_query(update raty set voter=voter+1,total=total+'$score' where id=1); $query = mysql_query(select * from raty where id=1); $rs = mysql_fetch_array($query); $aver = 0; if ($rs) { $aver = $rs['total'] / $rs['voter']; $aver = round($aver, 1) * 10; } //设置COOKIE setcookie(person, $cookiestr, time() + 3600 * 365); setcookie(rate_time, time(), time() + 3600 * 365); echo $aver; } }
raty表结构:
CREATE TABLE IF NOT EXISTS `raty` ( `id` int(11) NOT NULL auto_increment, `voter` int(10) NOT NULL default '0' COMMENT '评分次数', `total` int(11) NOT NULL default '0' COMMENT '总分', PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;
最后记得在raty评分表里面加一条数据。
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