<?php

function user_data($user_id) {
	$data = array();
	$user_id = (int)$user_id;

	$func_num_args = func_num_args();
	$func_get_args = func_get_args();

	if ($func_num_args > 1) {
		unset($func_get_args[0]);

		$fields = '`' . implode('`, `', $func_get_args) . '`';
		$data = mysql_fetch_assoc(mysql_query("SELECT $fields FROM `users` WHERE `user_id` = $user_id"));

		return $data;
	}
}

function logged_in() {
	return (isset($_SESSION['user_id'])) ? true : false;
}


function user_exists($username) {
	$username = sanitize($username);
	return (mysql_result(mysql_query("SELECT COUNT(`user_id`) FROM `users` WHERE `username` = '$username'"), 0) ==1) ? true : false;
};

function user_active($username) {
	$username = sanitize($username);
	return (mysql_result(mysql_query("SELECT COUNT(`user_id`) FROM `users` WHERE `username` = '$username' AND `active` = 1"), 0) ==1) ? true : false;
};

function user_id_from_username($username) {
	$username = sanitize($username);
	return mysql_result(mysql_query("SELECT `user_id` FROM `users` WHERE `username` = '$username'"), 0, 'user_id');

};

function login($username, $password) {
	$user_id = user_id_from_username($username);

	$username = sanitize($username);
	$password = md5($password);

	return (mysql_result(mysql_query("SELECT COUNT(`user_id`) FROM `users` WHERE `username` = '$username' AND `password` = '$password'"), 0) == 1) ? $user_id : false;
};




?>



<?php
session_start();
error_reporting(0);

require 'database/connect.php';
require 'functions/general.php';
require 'functions/users.php';

if (isset($_SESSION['loggedin']) && $_SESSION['loggedin'] == true) {
	$session_user_id = $_SESSION['user_id'];
	$user_data = user_data($session_user_id, 'user_id', 'username', 'password', 'first_name', 'last_name', 'email');
	echo $user_data['username'];
}

$errors = array();
?>