小雨在线网站自营销研究
 
  
 
 
 
  
   -----------data.php----------------------------------  array('id' => 1, 'min' => 1, 'max' => 29, 'prize' => '一等奖', 'v' => 1), '1' => array('id' => 2, 'min' => 302, 'max' => 328, 'prize' => '二等奖', 'v' => 2), '2' => array('id' => 3, 'min' => 242, 'max' => 268, 'prize' => '三等奖', 'v' => 5), '3' => array('id' => 4, 'min' => 182, 'max' => 208, 'prize' => '四等奖', 'v' => 7), '4' => array('id' => 5, 'min' => 122, 'max' => 148, 'prize' => '五等奖', 'v' => 10), '5' => array('id' => 6, 'min' => 62, 'max' => 88, 'prize' => '六等奖', 'v' => 25), '6' => array('id' => 7, 'min' => array(32, 92, 152, 212, 272, 332), 'max' => array(58, 118, 178, 238, 298, 358), 'prize' => '七等奖', 'v' => 50) ); 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 $result; } foreach ($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) { //七等奖 $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);