PHP大转盘抽奖简单实现例子

PHP大转盘抽奖简单实现例子

//奖品
$product = array(
'1' => array('precent'=>0, 'stock'=>0, 'name'=>'罗浮山门票'),
'2' => array('precent'=>5, 'stock'=>5, 'name'=>'罗浮山嘉宝田温泉体验券'),
'3' => array('precent'=>10, 'stock'=>5, 'name'=>'精美旅游书籍《山水酿惠州》'),
'4' => array('precent'=>15, 'stock'=>10, 'name'=>'碧海湾漂流门票'),
'5' => array('precent'=>20, 'stock'=>10, 'name'=>'南昆山门票'),
'6' => array('precent'=>50, 'stock'=>20, 'name'=>'云顶温泉精美礼品'),
);
//方法
function getRand($product) {
$result = false;
$precentSum = 0;
foreach ($product as $key => $pro){
$precentSum += $pro['precent'];
}
foreach ($product as $key => $pro) {
if ($pro['stock'] > 0) {
$precent = $pro['precent'];
$randNum = mt_rand(1, $precentSum);
if ($randNum <=$precent ) {
$result = $product[$key];
break;
} else {
$precentSum -= $precent;
}
}
}
return $result;
}
//测试100次，方便跟进真实概率
for($i=0;$i<100;$i++){
var_dump(getRand($product));
}