循環直到值爲空

Question

我需要循環刪除過程，如果在數據庫中存在用戶輸入的id。有人可以幫助我嗎？

//my php code 
$ppnum=$_POST['pnum']; 

while ($ppnum !== null)) { 
$con=mysqli_connect("","","",""); 
       if (mysqli_connect_errno()){ 
        echo "Failed to connect to MySQL: " . mysqli_connect_error(); 
       } 

mysqli_query($con,"DELETE FROM tbldd WHERE pnum ='$ppnum'"); 

mysqli_close($con);} 

Answer 1

也許你想要這樣嗎？這個假設$ _POST ['pnum']是以逗號分隔的ID列表。

$ppnum=$_POST['pnum']; 

$con=mysqli_connect("","","",""); 
if (mysqli_connect_errno()){ 
    echo "Failed to connect to MySQL: " . mysqli_connect_error(); 
} 

mysqli_query($con,"DELETE FROM tbldd WHERE pnum in ($ppnum)"); 

mysqli_close($con); 

但你必須檢查$ _POST ['pnum']對sql注入攻擊。