如何排序在while循環

Question

你好，這裏是我當前的代碼：

$sqlpack = "Select * from package_in_plan where plan_id='$package_id' order by plan_id"; 
$planres = mysqli_query($conn,$sqlpack); 

$plan = array(); 
while ($row1 = mysqli_fetch_assoc($planres)){ 
    $plan[] = $row1['package_id']; 
} 

$plan_1 = implode(',', $plan); 
for ($x = 0; $x < count($plan); $x++) { 
    $sql_service = "Select * from service_in_package where package_id='".$plan[$x]."'"; 
    $chid = mysqli_query($conn,$sql_service); 

    while ($row = mysqli_fetch_array($chid)){ 
     $ch_id = $row['service_id']; 

     $sql = "Select * from itv where status='1' and id='$ch_id' order by number asc"; 
     $results = mysqli_query($conn,$sql); 

     while ($row = mysqli_fetch_array($results)){ 
      $nr = $row['id']; 
      $namn = $row['name']; 
      $chnr = $row['number']; 
      echo $nr; 
      echo $namn; 
      echo $chnr; 
     } 
    } 
} 

我需要的是由數（$ CHNR）進行排序輸出，現在我的代碼是不排序，因爲它接收特定來自上一個select（$ ch_id）的id。 如何讓$結果的輸出按「按數量排序」進行排序。 數字在itv表中爲INT。

Answer 1

您可以使用子查詢，這會導致可以排序的單個查詢。

$sql = "Select * from itv where status='1' and id IN 
(Select service_id from service_in_package where package_id IN 
(Select package_id from package_in_plan where plan_id='$package_id' order by plan_id)) 
order by number asc"; 
$results = mysqli_query($conn,$sql); 

while ($row = mysqli_fetch_array($results)){ 
    $nr = $row['id']; 
    $namn = $row['name']; 
    $chnr = $row['number']; 
    echo $nr; 
    echo $namn; 
    echo $chnr; 
}