PHP编程：jQuery+PHP实现的掷色子抽奖游戏实例

<div class='demo'>
??? <div class='wrap'>
??????? <div id='msg'></div>
?????????? <div id='dice'><span class='dice dice_1' id='dice1'></span>
??????? <span class='dice dice_6' id='dice2'></span></div>
??? </div>
??? <ul id='prize'>
??????? <li id='d_0'><img src='images/0.gif' alt='开始'></li>
??????? <li id='d_1'><img src='images/1.gif' alt='现金100元'></li>
??????? <li id='d_2'><img src='images/2.gif' alt='泰迪熊宝宝'></li>
??????? <li id='d_3'><img src='images/7.gif' alt='谢谢参与'></li>
??????? <li id='d_4'><img src='images/3.gif' alt='iphone 5s'></li>
??????? <li id='d_5'><img src='images/4.gif' alt='笔记本电脑'></li>
??????? <li id='d_6'><img src='images/7.gif' alt='谢谢参与'></li>
??????? <li id='d_7'><img src='images/5.gif' alt='单反相机'></li>
??????? <li id='d_8'><img src='images/6.gif' alt='轿车'></li>
??????? <li id='d_9'><img src='images/7.gif' alt='谢谢参与'></li>
??? </ul>
</div>

.demo{width:650px; height:420px; margin:60px auto 10px auto; position:relative; }
.wrap{width:200px; height:100px; position:absolute; margin-left:220px; margin-top:140px; z-index:1000;}
#msg{display:none;width:50px; height:20px; padding:4px; background:#ffc; border:1px solid #fc9;?
text-align:center; color:#f30; font-size:18px; position:absolute; z-index:1001; right:-20px; top:-10px}
.dice{width:90px; height:90px; display:block; float:left; background:url(dice.png) no-repeat; cursor:pointer}
#dice_mask{width:200px; height:100px; background:#fff; opacity:0; position:absolute; top:0; left:0; z-index:999}
.dice_1{background-position:-5px -4px}
.dice_2{background-position:-5px -107px}
.dice_3{background-position:-5px -212px}
.dice_4{background-position:-5px -317px}
.dice_5{background-position:-5px -427px}
.dice_6{background-position:-5px -535px}
.dice_t{background-position:-5px -651px}
.dice_s{background-position:-5px -763px}
.dice_e{background-position:-5px -876px}
#prize{position:relative}
#prize li{position:absolute; width:150px; height:112px; border:1px solid #d3d3d3}
#d_0{left:0; top:0}
#d_1{left:160px; top:0}
#d_2{left:320px; top:0}
#d_3{left:480px; top:0}
#d_4{left:480px; top:128px}
#d_5{left:480px; top:256px}
#d_6{left:320px; top:256px}
#d_7{left:160px; top:256px}
#d_8{left:0; top:256px}
#d_9{left:0; top:128px}
.mask{opacity: 0.6; width:150px; height:112px; line-height:32px; background:#ffc;?
z-index:1001; position:absolute; top:0; left:0; text-align:center; font-size:16px}

$(function(){
??? $('#dice').click(function(){
??????? $('#prize li .mask').remove();
??????? $('.wrap').append('<div id='dice_mask'></div>');//加遮罩
??????? var dice1 = $('#dice1');
??????? var dice2 = $('#dice2');
??????? $.getJSON('dice.php',function(json){
??????????? var num1 = json[0];
??????????? var num2 = json[1];
??????????? diceroll(dice1,num1);//掷色子1动画
??????????? diceroll(dice2,num2);//掷色子2动画
??????????? var num = parseInt(num1)+parseInt(num2);
??????????? $('#msg').css('top','-10px').fadeIn(500).text(num+'点').animate({top:'-50px'},'1000').fadeOut(500);
??????????? roll(0,num);//逐步运动动画
??????? });
??? });
});

function diceroll(dice,num){
??? dice.attr('class','dice');//清除上次动画后的点数
??? dice.css('cursor','default');
??? dice.animate({left: '+2px'},100,function(){
??????? dice.addClass('dice_t');
??? }).delay(200).animate({top:'-2px'},function(){
??????? dice.removeClass('dice_t').addClass('dice_s');
??? }).delay(200).animate({opacity: 'show'},600,function(){
??????? dice.removeClass('dice_s').addClass('dice_e');
??? }).delay(100).animate({left:'-2px',top:'2px'},function(){
??????? dice.removeClass('dice_e').addClass('dice_'+num);
??????? dice.css('cursor','pointer');
??? });
}

function roll(i,step){
??? var time = setInterval(function(){
??????? if(i>9){
??????????? var t = i - 10;
??????????? $('#d_'+t).append('<div class='mask'></div>');
??????????? $('#d_'+(t-1)+' .mask').remove();
??????? }
??????? $('#d_'+i).append('<div class='mask'></div>');
??????? $('#d_'+(i-1)+' .mask').remove();
????????
??????? if(i==step){
???????????? clearInterval(time); //如果到达指定位置则停止
???????????? $('#dice_mask').remove();//移除遮罩
??????? }
??????? i++;//继续前进
??? },500);
}

//设置中奖概率
$prize_arr = array(
??? '2' => array('id'=>2,'v'=>10),
??? '3' => array('id'=>3,'v'=>20),
??? '4' => array('id'=>4,'v'=>5),
??? '5' => array('id'=>5,
??? '6' => array('id'=>6,
??? '7' => array('id'=>7,'v'=>2),
??? '8' => array('id'=>8,'v'=>3),
??? '9' => array('id'=>9,
??? '10' => array('id'=>10,'v'=>0),
??? '11' => array('id'=>11,
??? '12' => array('id'=>12,
);
?
foreach ($prize_arr as $key => $val) {
??? $arr[$val['id']] = $val['v'];
}
?
$sum = getRand($arr); //根据概率获取奖项id,得到总点数
?
//分配色子点数
$arrs = array(
??? '2' => array(array(1,1)),
??? '3' => array(array(1,2)),
??? '4' => array(array(1,3),array(2,
??? '5' => array(array(1,4),3)),
??? '6' => array(array(1,5),array(3,
??? '7' => array(array(1,6),7),4)),
??? '8' => array(array(2,array(4,
??? '9' => array(array(3,5)),
??? '10' => array(array(4,array(5,
??? '11' => array(array(5,6)),
??? '12' => array(array(6,6))
);
?
$arr_rs = $arrs[$sum];
$i = array_rand($arr_rs);//随机取数组
$arr_a = $arr_rs[$i];
shuffle($arr_a);//打乱顺序
echo json_encode($arr_a);

//计算概率
function getRand($proArr) {
??? $result = '';
?
??? //概率数组的总概率精度
??? $proSum = array_sum($proArr);
?
??? //概率数组循环
??? foreach ($proArr as $key => $proCur) {
??????? $randNum = mt_rand(1,$proSum);
??????? if ($randNum <= $proCur) {
??????????? $result = $key;
??????????? break;
??????? } else {
??????????? $proSum -= $proCur;
??????? }
??? }
??? unset ($proArr);
??? return $result;
}?