How to fix stmt prepare and bind - php

Question

I am having trouble using this prepare and bind. I have tried the same thing with less variables to bind. I have been successful using prepare with just Fname, Lname, Password, $UserID and using sssi with the bind_param object. Can someone explain what I am doing wrong when using more variables in my bind code? With the code below it only prints out the same data from mysqli and doesn't update it.
if ($stmt = $con->prepare("UPDATE users SET Fname = ?, Lname = ?, Password = ?, UserLevel = ?, Email = ?, WHERE UserID= ?"))
{
$stmt->bind_param("ssssssi", $firstname, $lastname, $PW, $UserLevel, $EM, $UserID);
$stmt->execute();
$stmt->close();
}
// show an error message if the query has an error
else
{
echo "ERROR: could not prepare SQL statement.";
}
// redirect the user once the form is updated
header("Location: admin.php");

Answer 1

Although you haven't specified the data types which makes this tricky, I'll hazard a guess.
Fname = s
Lname = s
Password = s
UserLevel = i (?)
Email = s
I count 4 s' there, yet you have 6.
Try this,
$stmt->bind_param("sssisi", $firstname, $lastname, $PW, $UserLevel, $EM, $UserID);
Edit 1
As #Fred-ii- said, your SQL query is wrong.
Change
"UPDATE users SET Fname = ?, Lname = ?, Password = ?, UserLevel = ?, Email = ?, WHERE UserID= ?"
to,
"UPDATE users SET Fname = ?, Lname = ?, Password = ?, UserLevel = ?, Email = ? WHERE UserID= ?"
You had a training ,.