php - 如何修复bind_param“无法传递参数”

我使用的网址：../ accessogiornaliero.php？idplayer = 45ccf2a79ec84c

accessogiornaliero.php：

$query = $mysqli->prepare('UPDATE player SET lastLogin = ?,loginstreak = ? WHERE idplayer = ?');
            $query->bind_param("sis", $qdata, $loginStreak, $_GET["idplayer"]);
            $qdata = $now->format('Y-m-d H:i:s');
            $query->execute();

错误：

[05-May-2019 21:19:05 Europe/Rome] PHP Fatal error:  Uncaught Error: Cannot pass parameter 3 by reference in .../accessogiornaliero.php:62
Stack trace:
#0 {main}
  thrown in .../accessogiornaliero.php on line 62

我哪里错了？

最佳答案

尝试分配值之前

  $query = $mysqli->prepare('UPDATE player SET lastLogin = ?,loginstreak = ? WHERE idplayer = ?');
        $qdata = $now->format('Y-m-d H:i:s');
        $idplayer =  $_GET["idplayer"];
        $query->bind_param("sis", $qdata, $loginStreak,  $idplayer );
        $query->execute();