分享一款jQuery九宫格大转盘抽奖代码网页特效，点击抽奖按钮开始随机抽奖选择奖品，可设置起点位置、奖品数量、转动次数、中奖位置参数，并且后台ajax.php可设置奖品和中奖概率。
首先我们在#lottery放置12个奖品，代码如下：点击“开始抽奖”按钮，并且远程ajax.php获取奖项：$(function() { Ajax.php
lottery.init('lottery');
$("#lottery a").click(function() {
if (click) {
return false;
} else {
lottery.speed = 100;
$.post("ajax.php", {
uid: 1
},
function(data) { //获取奖品，也可以在这里判断是否登陆状态
$("#lottery").attr("prize_site", data.prize_site);
$("#lottery").attr("prize_id", data.prize_id);
$("#lottery").attr("prize_name", data.prize_name);
roll();
click = true;
return false;
},
"json")
}
});
})
12个奖品数组如下，其中prize表示奖项内容，v表示中奖几率(若数组中七个奖项的v的总和为100，如果v的值为1，则代表中奖几率为1%，依此类推)$prize_arr = array( 获取随机奖品：
'0' => array('id' => 1, 'prize' => '一等奖', 'v' => 5),
'1' => array('id' => 2, 'prize' => '二等奖', 'v' => 5),
'2' => array('id' => 3, 'prize' => '三等奖', 'v' => 5),
'3' => array('id' => 4, 'prize' => '四等奖', 'v' => 5),
'4' => array('id' => 5, 'prize' => '五等奖', 'v' => 5),
'5' => array('id' => 6, 'prize' => '六等奖', 'v' => 5),
'6' => array('id' => 7, 'prize' => '七等奖', 'v' => 5),
'7' => array('id' => 8, 'prize' => '八等奖', 'v' => 5),
'8' => array('id' => 9, 'prize' => '九等奖', 'v' => 5),
'9' => array('id' => 10, 'prize' => '十等奖', 'v' => 5),
'10' => array('id' => 11, 'prize' => '十一等奖', 'v' => 25),
'11' => array('id' => 12, 'prize' => '十二等奖', 'v' => 25),
);foreach ($prize_arr as $k=>$v) { PHP抽奖演示：http://www.sucaihuo.com/php/129.html
$arr[$v['id']] = $v['v'];
}
$prize_id = getRand($arr); //根据概率获取奖项id
foreach($prize_arr as $k=>$v){ //获取前端奖项位置
if($v['id'] == $prize_id){
$prize_site = $k;
break;
}
}
$res = $prize_arr[$prize_id - 1]; //中奖项
$data['prize_name'] = $res['prize'];
$data['prize_site'] = $prize_site;//前端奖项从-1开始
echo json_encode($data);
PHP+jQuery+Ajax九宫格抽奖转盘.zip
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