PHP的說,它無法轉換爲INT:如何獲得使用PDO的列的總和?
注意:類PDOStatement對象的對象不能轉換在C INT:\ XAMPP \ htdocs中\網絡學習\網頁\學生\ upload.php的上線76:
$userLoggedIn = $_SESSION['username'];
$stmt = $conn->prepare( "SELECT s.grade_level, s.section
FROM tblusers as u
JOIN tblstudents as s
ON u.username = s.username
WHERE u.username = :username");
$stmt->execute(array(':username' => $userLoggedIn));
$file = $_FILES['file']['name'];
$filesize = $_FILES['file']['size'];
$filepath = "../../assets/uploads/" . $file;
$filelimit = $conn->prepare("SELECT SUM(f.filesize)
FROM tblfiles AS f
JOIN tblstudents AS s
ON f.uploader = s.username
WHERE f.uploader = ':username'");
$filelimit->execute(array(':username'=>$userLoggedIn));
這是行76:如果($ filelimit> 1048576)
有用於獲取一筆沒有區別。您獲取的方式與其他數據完全相同。要學習如何使用PDO獲取數據,您需要**遵循**教程**。 –