貌似有些不合理，麻烦大家帮忙指正指正！谢谢~

     =0;$j--){            if($j==0){                $tmp['b']=intval(0);                $tmp['e']=intval($arr[$j]['v']);                return $tmp;            }else{                $tmp['b']=intval($arr[$j-1]['e']);                $tmp['e']=intval($arr[$j-1]['e']+$arr[$j]['v']);                return $tmp;            }        }    }            function dorand(){        //奖品        $prize_arr = array(            '0' => array('id'=>1,'prize'=>'平板电脑','v'=>3),            '1' => array('id'=>2,'prize'=>'数码相机','v'=>5),            '2' => array('id'=>3,'prize'=>'音箱设备','v'=>10),            '3' => array('id'=>4,'prize'=>'4G优盘','v'=>12),            '4' => array('id'=>5,'prize'=>'Q币10元','v'=>20),            '5' => array('id'=>6,'prize'=>'下次没准就能中哦','v'=>50),        );        //计算概率范围        for($i=0;$i
     
       $val) {            $arr[$val['id']]['v'] = $val['v'];            $arr[$val['id']]['b'] = $val['b'];            $arr[$val['id']]['e'] = $val['e'];            $arr[$val['id']]['prize'] = $val['prize'];            //获取概率总和            $sum +=$arr[$val['id']]['v'];        }        ///产生随机数        $r = mt_rand(1, $sum);        //var_dump($arr);        //遍历数据        foreach($arr as $k=>$v){            //exit;            //判断概率区间            if(($v['b']<=$r && $v['e']>=$r)){                //echo "随机数:".$r . "\t" . "概率".$v['b']."--".$v['e'] . "\t"."总概率:".$sum. "\n";                //返回中奖id                $id = $k;                return $prize = $arr[$k]['prize'];                break;            }        }    }    $one = 0;    $two = 0;    $three = 0;    $four = 0;    $five = 0;    $six = 0;    for($z=1;$z<=100;$z++){        if(dorand()=="平板电脑"){            $one++;        }       if(dorand()=="数码相机"){            $two++;        }       if(dorand()=="音箱设备"){            $three++;        }        if(dorand()=="4G优盘"){            $four++;        }        if(dorand()=="Q币10元"){            $five++;        }        if(dorand()=="下次没准就能中哦"){            $six++;        }        echo "\r\n第【".$z."】次中奖奖品为：".dorand()."
      
";    }        echo "平板电脑 :".(($one/100)*100)."%";        echo '
';                echo "数码相机 :".(($two/100)*100)."%";        echo '
';                echo "音箱设备 :".(($three/100)*100)."%";        echo '
';                echo "4G优盘 :".(($four/100)*100)."%";        echo '
';                echo "Q币10元 :".(($five/100)*100)."%";        echo '
';                echo "下次没准就能中哦 :".(($six/100)*100)."%";        echo '
';            ?>