查询正在第二次尝试但不是第一次尝试

PHP新手

我想跟踪用户上次登录的时间，因此我在数据库中添加了带时间戳的列，每次用户登录时都可以更新，并在登录功能中添加了更新，但是当我登录时出现错误说“ SQLSTATE [HY000]：一般错误”，数据库没有任何反应，但是如果我再次单击“登录”，它将很好地登录我并根据需要更新表。这是我的登录功能：

public function login($email,$upass)
{
    try
    {
        $stmt = $this->conn->prepare("SELECT * FROM po_users WHERE userEmail=:email_id ");
        $stmt->execute(array(":email_id"=>$email));
        $userRow=$stmt->fetch(PDO::FETCH_ASSOC);

        if($stmt->rowCount() == 1)
        {
            if($userRow['userStatus']=="Y")
            {
                if($userRow['userPass']==md5($upass))
                {

                    $_SESSION['userSession'] = $userRow['userID'];
                    $stmt = $this->conn->prepare("UPDATE po_users SET lastLogIn = current_timestamp WHERE userEmail=:email_id");
                    $stmt->execute(array(":email_id"=>$email));
                    $userRow=$stmt->fetchAll(PDO::FETCH_ASSOC);
                    return true;
                }

有任何想法吗？

花生仁

您实际上无法在更新后使用“ fetchAll” ...因此，请尝试以下操作：

public function login($email,$upass) {
    try {
        $select_user_stmt = $this->conn->prepare("SELECT * FROM po_users WHERE userEmail=:email_id ");
        $select_user_stmt->execute(array(":email_id"=>$email));
        $userRow = $select_user_stmt->fetch(PDO::FETCH_ASSOC);

        if($select_user_stmt->rowCount() == 1) {
            if($userRow['userStatus']=="Y") {
                if($userRow['userPass'] == md5($upass)) {
                    $_SESSION['userSession'] = $userRow['userID'];
                    $update_user_stmt = $this->conn->prepare("UPDATE po_users SET lastLogIn = current_timestamp WHERE userEmail=:email_id");
                    $update_user_stmt->execute(array(":email_id"=>$email));
                    $select_user_stmt->execute(array(":email_id"=>$email)); // do a search again here...
                    $userRow = $select_user_stmt->fetch(PDO::FETCH_ASSOC);
                    return true;
                }