Check if username exists PDO

Question

How would I be able to check multiple factors combined instead of checking for each one? So basically I\'m using PDO and I have to make sure that the usernames and emails ar

Answer 1

Something like this should work:

function userExists($db, $user)
{
    $userQuery = "SELECT * FROM userinfo u WHERE u.user=:user;";
    $stmt = $db->prepare($userQuery);
    $stmt->execute(array(':user' => $user));
    return !!$stmt->fetch(PDO::FETCH_ASSOC);
}

$user = 'userName';
$exists = userExists($db, $user);
if(exists)
{
     // user exists already.
}
else
{
     // user doesn't exist already, you can savely insert him.
}