$gailv_arr = array(); $gailv_arr[11] = 1; $gailv_arr[2] = 1; $gailv_arr[33] = 1; $gailv_arr[44] = 1; $gailv_arr[55] = 1; $proSum = array_sum($gailv_arr); if($proSum==0){ echo "没有奖品了"; exit(); } arsort($gailv_arr); //概率数组循环 $zhongjiang_id = 0; foreach ($gailv_arr as $key => $vo) { $randNum = mt_rand(1, $proSum); if ($randNum <= $vo) { $zhongjiang_id = $key; break; } else { $proSum -= $vo; } } echo $zhongjiang_id;
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