Question

I’m wondering why my PDO statement returns 1 row but the data is empty when i assign it to a variable.

I have this:

    $stmt = $pdo->prepare("SELECT count(uid) AS total,uid FROM accounts WHERE username = ? AND pass = ?"); 
    try {
        $stmt->execute(array($temp[0],$temp[1]));
    } catch (PDOException $e) {
        echo $e -> getMessage(); exit;
    }

    $row = $stmt -> fetch();
    if(!$row['total']){
        echo json_encode(0);
    } else {            
        $_SESSION['userData'] = $stmt->fetchAll(PDO::FETCH_ASSOC);
        echo json_encode($_SESSION['userData']); 
    }

When i echo the session it returns []

Is it because i do a fetch before the fetchAll ? If so how can i change it prevent that problem?

Answer 1

you can modify your code like this

currently what you are doing is first you check no. of rows by PDO::Fetch() and later you fetch that row with PDOStatement::fetchAll

you can apply below approach which is more clear

First count the row using PDOStatement::rowCount()

PDOStatement::rowCount() returns the number of rows affected by a
DELETE, INSERT, or UPDATE statement.

and then use PDOStatement::fetch to fetch the row.

$sth->fetch(PDO::FETCH_ASSOC);