Question

if (isset($_POST['finalSeats']))
{

从帖子中获取变量

$TicketType =$_POST['Tickettype'];
$seatS=$_POST['finalSeats'];
$EventId=$_POST["Eventid"];

从最后一页获取数组

$cats = array_filter(array_map('trim', explode(',', $seatS)));
$sqlData = array();

使用foreach逐个获取值

foreach($cats as $key => $cat ) {
$stmt = $con->prepare("SELECT * FROM fistevent WHERE `Event_Id`=? AND `TicketType`=? AND `seats`= ?") or die($con->error);
$stmt->bind_param("sss",$EventId , $TicketType,$cat);
$stmt->execute();
$stmt->store_result();

绑定结果

$stmt-> bind_result($id,$Event_Id,$TicketType,$row_name,$seats,$Status);
while($stmt->fetch())
{
$data[] = array($id,$Event_Id,$TicketType,$row_name,$seats,$Status);
$Tickettype=$TicketType;
$Rowname=$row_name;
$Seats=$seats;
$status=$Status;

比较值数组和数据库值

if($Seats===$cat && $status==='Hold')
{
echo'<script>window.location="selection.php";</script>';
}

如果不匹配则更新查询

else
{
$seatS=$_POST['finalSeats'];
$Eventid=$_POST["Eventid"];
$_SESSION['Eventid']=$Eventid;
$cats = array_filter(array_map('trim', explode(',', $seatS)));
$stmt = $con->prepare('UPDATE fistevent SET `Status`="Hold" where `Event_Id`=? AND `seats`= ? ') or die($con->error);
$stmt->bind_param("ss", $_POST['Eventid'], $cat);
foreach($cats as $key => $cat ) {
$stmt->execute();
} 
}

}
}
}

Answer 1

根据您更新的代码段，您需要更改代码中的一些内容，例如：

按以下方式更改准备好的陈述，
```
if str(i) != "test" and str(i) != "test2":
      print ("i is not test or test2")
    else:
      print ("i is test or test2")
```
这样，您就不必在代码中使用此$stmt = $con->prepare("SELECT * FROM fistevent WHERE `Event_Id`=? AND `TicketType`=? AND `seats`= ? AND status='Hold'") or die($con->error);条件语句或if($Seats===$cat && $status==='Hold')语句。
绑定结果后，只需执行以下操作：
```
while($stmt->fetch()){ ...
```

解决方案：

根据下面的对话，要求是：如果数组（E4，E5，E6）已存在于数据库中且状态为hold，则在下一轮中有人选择（E3，E5，E7）（E5在如果数据库和相应的状态被保持，页面应该被重定向，并且（E3，E5，E7）数组中的值不会被更新。仅当数组值为新值且未保持时，才会更新该表。所以这是解决方案代码片段，

...
$stmt->bind_result($id,$Event_Id,$TicketType,$row_name,$seats,$Status);
if($stmt->num_rows){
    header("Location: selection.php");
    exit();
}else{
    $seatS=$_POST['finalSeats'];
    $Eventid=$_POST["Eventid"];
    $_SESSION['Eventid']=$Eventid;
    $cats = array_filter(array_map('trim', explode(',', $seatS)));
    $stmt = $con->prepare('UPDATE fistevent SET `Status`="Hold" where `Event_Id`=? AND `seats`= ? ') or die($con->error);
    foreach($cats as $cat ) {
        $stmt->bind_param("ss", $Eventid, $cat);
        $stmt->execute();
    } 
}

如何在数组值与数据库值匹配时重定向页面

1 个答案:

解决方案：