关于#PHP#的问题，如何解决？

Question

帮忙给写个PHP的循环，想跟着学习学习。$dingdanshuliang达到10的时候重新从commission11循环

```php
if($dingdanshuliang==1 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission11'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==2 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission12'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==3 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission13'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==4 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission14'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==5 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission15'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==6 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission16'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==7 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission17'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==8 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission18'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==9 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission19'] * $commission_totalprice * 0.01;    



if($dingdanshuliang==10 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission11'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==11 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission12'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==12 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission13'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==13 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission14'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==14 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission15'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==15 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission16'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==16 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission17'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==17 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission18'] * $commission_totalprice * 0.01;
                            if($dingdanshuliang==18 && $agleveldata1) $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]['commission19'] * $commission_totalprice * 0.01;

```

Answer 1

模运算

if ($agleveldata1) {
    $index = ($dingdanshuliang % 10 == 0) ? 10 : $dingdanshuliang % 10;
    $ogupdate['parent1commission'] = $commissiondata[$agleveldata1['id']]["commission1{$index}"] * $commission_totalprice * 0.01;
}

$index用于存储想用的commission的编号。当$dingdanshuliang是10的倍数时，设置$index为10，否则设置$index为$dingdanshuliang除以10的余数。
这样使得代码更加简洁，避免了大量的重复的if条件语句。