准備好的語句中的准備好的語句

Question

我一直在嘗試將每個人的ID列入某個事件。 哪個有效。 但是，由於某種原因，這是行不通的。 以前什么時候做過。 我在測試時意識到，當我將$ userRes-> close放在while（$ userRes-> fetch（））之后時，$ user = getUser（$ connection，$ id）可以工作，但是當它在循環之外時卻沒有不行 這是我的代碼：

$userQuery = "SELECT person_id FROM RosterPeopleEvent WHERE news_id=?;";
$userRes = $connection->prepare($userQuery);
$userRes->bind_param('i', $eventID);
$userRes->execute();
$userRes->bind_result($id);

while ($userRes->fetch()){
    $user = getUser($connection, $id);
    if ($user == $_SESSION["uid"]){
        $p->addContent("You have volunteered for the BBQ <a href=roster.php?rosterid=1&personid=$id&eventid=$eventID&class=remove rel=external>Remove</a>, ");  
    }
    else{
        $p->addContent("$user has volunteered for the BBQ <a href=roster.php?rosterid=1&personid=$id&eventid=$eventID&class=remove rel=external>Remove</a>, "); 
    }                           
}
$userRes->close();      

Answer 1

固定版本：

$userQuery = "SELECT person_id FROM RosterPeopleEvent WHERE news_id=?;";
$userRes = $connection->prepare($userQuery);
$userRes->bind_param('i', $eventID);
$userRes->execute();
$userRes->bind_result($id);
$userRes->store_result();

while ($userRes->fetch()){
    $user = getUser($connection, $id);
    if ($user == $_SESSION["uid"]){
        $p->addContent("You have volunteered for the BBQ <a href=roster.php?rosterid=1&personid=$id&eventid=$eventID&class=remove rel=external>Remove</a>, ");  
    }
    else{
        $p->addContent("$user has volunteered for the BBQ <a href=roster.php?rosterid=1&personid=$id&eventid=$eventID&class=remove rel=external>Remove</a>, "); 
    }                           
}
$userRes->close();