微信 php 喝酒转盘小程序

<?php $prize_arr = array( '0' => array('id'=>1,'min'=>1,'max'=>29,'prize'=>'喝一杯','v'=>1), '1' => array('id'=>2,'min'=>302,'max'=>328,'prize'=>'交杯酒','v'=>2), '2' => array('id'=>3,'min'=>242,'max'=>268,'prize'=>'和左边的朋友喝一杯','v'=>5), '3' => array('id'=>4,'min'=>182,'max'=>208,'prize'=>'和右边的朋友喝一杯','v'=>7), '4' => array('id'=>5,'min'=>122,'max'=>148,'prize'=>'自罚三杯','v'=>10), '5' => array('id'=>6,'min'=>62,'max'=>88,'prize'=>'和对面的朋友喝一杯','v'=>25), '6' => array('id'=>7,'min'=>array(32,92,152,212,272,332), 'max'=>array(58,118,178,238,298,358),'prize'=>'免喝令','v'=>50) ); foreach ($prize_arr as $key => $val) { $arr[$val['id']] = $val['v']; } $rid = getRand($arr); //根据概率获取奖项id $res = $prize_arr[$rid-1]; //中奖项 $min = $res['min']; $max = $res['max']; if($res['id']==7){ $i = mt_rand(0,5); $result['angle'] = mt_rand($min[$i],$max[$i]); }else{ $result['angle'] = mt_rand($min,$max); //随机生成一个角度 } $result['prize'] = $res['prize']; echo json_encode($result); 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; }