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File: clsLoginHandler.txt

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File: clsLoginHandler.txt
Role: Documentation
Content type: text/plain
Description: Help file
Class: clsLoginHandler
Generic user authentication interface
Author: By
Last change:
Date: 16 years ago
Size: 4,306 bytes


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This class allows to keep user log-in management.

function LoginHandler($NotLoggedInURL,$dbhandler,$uc_rules) {

Purpose          : Constructor

$NotLoggedinURL  : URL to be redirected to if no user is logged in
$dbHandler       : A dbHandler instance (See class_db.php in my classes)
$uc_rules        : User control rules. See below.

function SetPasswordHandler($new_passhandler) {

Purpose          : Allows to use your favorite password encryption method. 
                   The funtion will be used as a callback.
$new_passhandler : The function name

function LoggedIn () 

Purpose          : Checks if is there an user logged in

function _debugUserInfo() {

Purpose          : returns the internal info of the class in HTML code

function CheckLogin($user,$pass)

Purpose          : Checks if user/pass combination is valid or not.

$user            : the username 
$pass            : the password


The User control Rules is an associative array whom structure is as follows:

"LEVEL"                  Arbitrary level name. It may be something like "primary", "secondary", etc. It's an associative array
    "type"               Rule type. Valid values are: "table" or "fixed"
    "name"               Used only if "type" is "table". Represents the table name that contains users info
    "user_field"         Used only if "type" is "table". Must be set to the actual field name inside table "name"
    "pass_field"         Used only if "type" is "table". Must be set to the actual field name inside table "name"
    "master_password"    Used for setting up a masterkey password. Usefull if you don't want to have to know every user's password.
    "extra_conditions"   Used only if "type" is "table". Can contain any extra conditions to ensure that user is valid.
    "session_info"       A String containing variables that will be set for the current session. The format of this string is as follows:

			 where var_name is the session variable to be set
			 |field_name is the field name which value will be assigned to session variable var_name,
			 %value is the value to be assigned to the session variable
                         If not used the format |field_name or %value, the value of the field named "var_name" will be assigned to de session var.
    "username"           Used if "type" is "fixed". Allows to permit anonimous access to your site.

An example of user rules is below:

	function cryptpass($password) {

		return md5($password);

		"session_info"=>"user_id%-1,skin%default,name%unregistered user,email%,show_in_home%startpage,last_login%,LOGGED_IN%false,adminuser%false"

	$dbHandler=new db_mysql("localhost","username","password","my_database");
	$myLoginHandler=new LoginHandler("login.php",$dbHandler,$UserCheckRules);


	if (!$myLoginHandler->LoggedIn()) {

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