Cannot Insert ID into MySQL Table - php

Question

What I am trying to do is allow the user to create a table and I want to add the userID of the user into the first line of the table so I can access it later. However, when trying to insert the ID, I keep getting an error message saying I cannot add it. Here is my code:
<?php
# $db = new mysqli('localhost', 'root', 'secret', 'Pokemon'); //open db
if ($db->connect_error) {
echo 'ERROR: Could not connect to database, error is '. $db->connect_error;
exit;
} else {
echo 'Successful connection established<br />';
}
$deckName = stripslashes($_POST['deckName']); //sql sanitize for each input.
$deckName = $db->real_escape_string($deckName);
$checkQuery = "SELECT userID FROM userInfo WHERE userEmail = ?";
$checkStmt = $db->prepare($checkQuery);
$checkStmt->bind_param("s", $SESSION['userEmail']);
$checkStmt->execute();
if ( ($checkStmt->errno <> 0) || ($checkStmt->num_rows > 0) )
{
$checkStmt->close();
echo 'ERROR: Something is wrong';
exit;
}
$res = $checkStmt->get_result();
$row = $res->fetch_assoc();
$checkStmt->close();
$query = "CREATE TABLE `".$deckName."` (userID int(3), pokeID int(3), pokeName varchar(20), quantity int(1),
PRIMARY KEY (userID) )";
$stmt = $db->prepare($query);
$stmt->execute();
if ($stmt->errno <> 0)
{
$stmt->close();
$db->close();
echo 'ERROR: Could not create table';
exit;
}
$stmt->close();
$query = "INSERT INTO `".$deckName."` (userID) VALUES(?)";
$stmt = $db->prepare($query);
$stmt->bind_param("i", $row['userID']);
$stmt->execute();
if ($stmt->errno <> 0)
{
$stmt->close();
$db->close();
echo 'ERROR: Could not add to database';
exit;
}
$stmt->close();
$db->close();
header("Location: viewCards.php");
?>
It creates the table, but will not insert the userID. I have looked at this trying to find what the issue is, and I would like a fresh set of eyes to look at it if possible.

Answer 1

Use $_SESSION['userEmail'] instead of $SESSION['userEmail'] and there is no session_start()