PliggConnect for WordPress WordPress and Pligg bridge plugin.

wpconnect.php

<?php
/*
* 1. create wp plugin for pligg
* 2. create file wpconnect.php at pligg root
*/

$pligg_url = '';
$pligg_path = '';

/*
* When user log-in from WP, also log-in to Pligg.
*/
add_filter( 'authenticate', 'pligg_auth_signon', 30, 3 );
function pligg_auth_signon( $user, $username, $password ) {
  //return $user;
  require_once( $pligg_path .'/wpconnect.php');
  m3_pligg_user_auth($username, $password);
}
/*
* When user created from WP, Register with Pligg
*/
add_action('user_register', 'pligg_registration_save');
function pligg_registration_save($user_id) {
  //Collect user data

  //register with Pligg
  require_once( $pligg_path .'/wpconnect.php');
  m3_pligg_user_register($username, $password);

}

/*
* When user update his profile, Update Pligg details
*/
add_action( 'profile_update', 'pligg_profile_update', 10, 2 );
function pligg_profile_update( $user_id, $old_user_data ) {
  require_once( $pligg_path .'/wpconnect.php');
  m3_pligg_user_update($username, $password);
}

/*
* When user delete from WP, delete from Pligg
*/
add_action( 'delete_user', 'pligg_delete_user' );
function pligg_delete_user( $user_id ) {
  global $wpdb;
 
  $user_obj = get_userdata( $user_id );
  $email = $user_obj->user_email;
        
  //Delete Pligg user
  require_once( $pligg_path .'/wpconnect.php');
  m3_pligg_user_delete($username, $password);
  
  //Send email
  $headers = 'From: ' . get_bloginfo( "name" ) . ' <' . get_bloginfo( "admin_email" ) . '>' . "\r\n";
 	wp_mail( $email, 'You are being deleted, brah', 'Your account at ' . get_bloginfo("name") . ' is being deleted right now.', $headers );
}

/*
* When user logout from WP, make logout from Pligg
*/
add_action('wp_logout', 'pligg_logout');
function pligg_logout() {

  require_once( $pligg_path .'/wpconnect.php');
  m3_pligg_user_logout($username, $password);
}


Pligg changes
1. Redirect register.php to wp-register.php
2. Redirect login.php to wp-login.php
3. Redirect logout.php to wp-logout.php

wpconnect.php

function m3_pligg_user_auth($username, $password){
  
}

function m3_pligg_user_register($username, $password){
	
}

function m3_pligg_user_update($username, $password){
	
}

function m3_pligg_user_delete($username, $password){
	
}

function m3_pligg_user_logout(){
	
}

function get_pligg_user(){
	if(isset($_COOKIE['mnm_user']) && isset($_COOKIE['mnm_key']) && $_COOKIE['mnm_user'] !== '') {
		$userInfo=explode(':', base64_decode($_REQUEST['mnm_key']));
		if(crypt($userInfo[0], 22) === $userInfo[1] && $_COOKIE['mnm_user'] === $userInfo[0]) {
			$pligg_username = $db->escape($_COOKIE['mnm_user']);
		}
	}
}
function Authenticate($username, $pass, $remember=false) {
	global $db;
	$dbusername=$db->escape($username);
	$user=$db->get_row("SELECT user_id, user_pass, user_login FROM users WHERE user_login = '$dbusername'");
	$saltedpass=generateHash($pass, substr($user->user_pass, 0, SALT_LENGTH));
	if ($user->user_id > 0 && $user->user_pass === $saltedpass) {
		$this->user_login = $user->user_login;
		$this->user_id = $user->user_id;
		$this->authenticated = TRUE;
		$this->md5_pass = md5($user->user_pass);
		$this->SetIDCookie(1, $remember);
		$lastip=$_SERVER['REMOTE_ADDR'];
		mysql_query("UPDATE users SET user_lastip = '$lastip' WHERE user_id = {$user->user_id} LIMIT 1?);
		mysql_query("UPDATE users SET user_lastlogin = now() WHERE user_id = {$user->user_id} LIMIT 1?);
		return true;
	}
	return false;
}

function Logout($url='./') {
	$this->user_login = "";
	$this->authenticated = FALSE;
	$this->SetIDCookie (0);
	//header("Pragma: no-cache");
	header("Cache-Control: no-cache, must-revalidate");
	header("Location: $url");
	header("Expires: " . gmdate("r", time()-3600));
	header("ETag: \"logingout" . time(). "\"");
	die;
}

function SetIDCookie($what, $remember) {
	switch ($what) {
		case 0:  // Borra cookie, logout
			setcookie ("mnm_user", "", time()-3600, "/"); // Expiramos el cookie
			setcookie ("mnm_key", "", time()-3600, "/"); // Expiramos el cookie
		break;
		case 1: //Usuario logeado, actualiza el cookie
			// Atencion, cambiar aqu?cuando se cambie el password de base de datos a MD5
			$strCookie=base64_encode(join(':',
			array(
				$this->user_login,
				crypt($this->user_login, 22),
				$this->md5_pass)
			)
			);
			if($remember) $time = time() + 3600000; // Lo dejamos v?idos por 1000 horas
			else $time = 0;
			setcookie("mnm_user", $this->user_login, $time, "/");
			setcookie("mnm_key", $strCookie, $time, "/");
		break;
	}
}