中奖概率

抽奖大转盘演示：http://www.sucaihuo.com/php/3301.html

function getRand($proArr, $proCount) {

$result = '';

$proSum = 0;

foreach ($proCount as $key => $val) {

if ($val <= 0) {

continue;

} else {

$proSum = $proSum + $proArr[$key];

}

}

foreach ($proArr as $key => $proCur) {

if ($proCount[$key] <= 0) {

continue;

} else {

$randNum = mt_rand(1, $proSum);

if ($randNum <= $proCur) {

$result = $key;

break;

} else {

$proSum -= $proCur;

}

}

}

unset($proArr);

return $result;

}

奖品设置

$prizes = array(

0 => array(

"id" => 0, //中奖id

"name" => "谢谢参与", //奖品名称

"count" => "100", //库存

),

1 => array(

"id" => 1,

"name" => "罗浮山门票",

"count" => "40",

),

2 => array(

"id" => 2,

"name" => "罗浮山嘉宝田温泉体验券",

"count" => "40",

),

3 => array(

"id" => 3,

"name" => "精美旅游书籍《山水酿惠州》",

"count" => "40",

),

4 => array(

"id" => 4,

"name" => "碧海湾漂流门票",

"count" => "40",

),

5 => array(

"id" => 5,

"name" => "南昆山门票",

"count" => "40",

),

6 => array(

"id" => 6,

"name" => "云顶温泉精美礼品",

"count" => "40",

),

);