library.php

<?php
/****************************************************************************** 
 * Name: Dean Lorenzo
 * Student number: 0367298
 * Course: Web Development - 2008 (228566)
 * Assignment: Final Project
 * Created: Nov 12, 2022
 * Updated: Dec 04, 2022 
 * Purpose: This library stores the funcitons to be re-used by the Foodzagram 
 *          website.
 *****************************************************************************/

    require('connect.php');
    require('ImageResize.php');
    require('ImageResizeException.php');

    // This function checks to see if a user is logged in succesfuly and
    // creates a SESSION variable 'username' if the session is created. 
    // PARAMETER: $db is a connection to the database 
    function CheckLogin($db){
        if(isset($_SESSION['username'])){
            $username = $_SESSION['username'];
 
            $qry = "SELECT * FROM User WHERE username 
                = :username AND active = 1 LIMIT 1";
        
            $stm = $db->prepare($qry);
    
            $stm->bindvalue('username', $username, PDO::PARAM_STR);
            
            $stm->execute();            
            
            if($stm->rowCount() > 0){                
                $usr_dat = $stm->fetch();                             
                return $usr_dat;
            }
        }    
    } 

    // This function redirects a visitor to the site to log in if they
    // are trying to access a page that only registered site users and 
    // admins have access to.
    function LoginRedirect(){
        if(!isset(($_SESSION['username']))){
            header("Location: login.php");
            die;    
        }       
    }
?>