isLoggedIn.php

<?php
    if(isset($_SESSION['user'])){

        $user = $_SESSION['user']; 
        include_once('dbConnect.php');
        $sql = "SELECT * FROM User_info i, User_body b WHERE i.userID = $user AND b.userID = $user"; 
        $result = $conn->query($sql);


    try
    {

        if($user)
        {

        	if ($result->num_rows > 0) {
        		while($row = $result->fetch_assoc()) {
        			$_SESSION['user_weight'] = $row['current_weight']; 
        			$_SESSION['user_height'] = $row['height']; 
        			$_SESSION['user_age'] = $row['age']; 
        		}
        	}
        	
        }
        else
        {
            throw new Exception("You must be logged in to review your account information");
        }
    }
    catch(Exception $e)
    {
        echo $e->getMessage();
    }
    
}
else {
    echo "You must be logged in to complete this action";
}


?>