PapaFace.com

Hello,
Well it has been a while since any posts were made here so I guess its time for me to post something useful (if you're a coder).
I've been working on a new project and in the process I have been constructing a login/register class that could easily fit into any current script I think.
Here it is 🙂

<?php
class MemberFunctions
	{
	var $pass;
	var $username;
	var $email;
	var $userid;

	function CheckUsername($username)
		{
		$username = trim($username);
		if	(!empty($username))
			{
               $check = mysql_query(&apos;SELECT `id`,`username` FROM `members` WHERE `username`="&apos;.$username.&apos;"&apos;);
               if	(mysql_num_rows($check) == 0)
               	{
               	list($_id,$un) = mysql_fetch_array($check);
               	$this->username = $username;
               	$this->userid = $_id;
               	return true;
               	}
               else
				return false;
			}
		else
			return false;
		}

	function CheckPasswords($pw1,$pw2)
		{
		$pw1 = trim($pw1);
		$pw2 = trim($pw2);
		if	(!empty($pw1) && !empty($pw1))
			{
			$pw1 = md5(trim($pw1));
		  	$pw2 = md5(trim($pw2));
				if	($pw1 == $pw2)
					{
					$this->pass = $pw1;
					return true;
					}
				else
					return false;
			}
		else
			return false;
		}

	function CheckEmailAddress($email)
		{
			$email = trim($email);
			if	(!empty($email))
				{
				$this->email = $email;
				return true;
				}
			else
				return false;
		}

	function Register()
		{
		$insert = mysql_query("INSERT INTO `members` (username,password,email) VALUES (&apos;".$this->username."&apos;,&apos;".$this->pass."&apos;,&apos;".$this->email."&apos;)");
		if	($insert)
			{
			$_SESSION[&apos;loggedin&apos;] = 1;
			$_SESSION[&apos;username&apos;] = $this->username;
			$_SESSION[&apos;userid&apos;] = $this->userid;
			return true;
			}
		else
			return false;
		}

	function LoginCheckUsername($username)
		{
		if	(!empty($username))
			{
               $check = mysql_query(&apos;SELECT `id`,`username` FROM `members` WHERE `username`="&apos;.$username.&apos;"&apos;);
               if	(mysql_num_rows($check) == 1)
               	{
               	list($_id,$un) = mysql_fetch_array($check);
               	$this->username = $username;
               	$this->userid = $_id;
               	return true;
               	}
               else
				return false;
			}
		else
			return false;
		}

	function LoginCheckPassword($pw)
		{
		if	(!empty($pw))
			{
			$pw = md5($pw);
                  $check = mysql_query("SELECT `password` FROM `members` WHERE `password`=&apos;".$pw."&apos; AND `username`=&apos;".$this->username."&apos;");
                  if	(mysql_num_rows($check) == 1)
                  	{
                  	$this->pass = $pw;
                  	return true;
                  	}
                  else
                  	return false;
			}
		else
			return false;
		}

	function Login()
		{
		if	($this->pass != "" && $this->username != "")
			{
			$_SESSION[&apos;loggedin&apos;] = 1;
			$_SESSION[&apos;username&apos;] = $this->username;
			$_SESSION[&apos;userid&apos;] = $this->userid;
			return true;
			}
		else
			return false;
		}

	function Logout()
		{
		if	($_SESSION[&apos;loggedin&apos;] == 1)
			{
			$_SESSION[&apos;loggedin&apos;] = 0;
			return true;
			}
		else
			return false;
		}


	}
$_mem = new MemberFunctions();
?>

Feel free to offer any suggestions as to how the code can be improved as it is still in its early stages.

Update 02 Jan 2008:
I have updated the code to change a few things.

Here is also a way to use the class in your script:

<?php
if	(!$_mem->LoginCheckUsername($_POST[&apos;username&apos;]))
		{
		$_SESSION[&apos;lerror&apos;][] = "Incorrect username entered.";
		}
	if	(!$_mem->LoginCheckPassword($_POST[&apos;password&apos;]))
		{
		$_SESSION[&apos;lerror&apos;][] = "You have entered an incorrect password. Please try again.";
		}
	if	($_SESSION[&apos;lerror&apos;])
		{
  		header(&apos;Location: login.php&apos;);
  		exit;
		}
	else
		{
            if	(!$_mem->Login())
            	{
            	$_SESSION[&apos;lerror&apos;][] = "There was a problem logging you in, please try again later.";
            	header(&apos;Location: login.php&apos;);
  				exit;
            	}
          	else
          		{
          		$_loggedin = 1;
          		}
		}
?>

If there are any errors you can print them out using this code:

<?php
if(!empty($_SESSION[&apos;lerror&apos;])){
   if(is_array($_SESSION[&apos;lerror&apos;])){
        foreach($_SESSION[&apos;lerror&apos;] as $value){
              echo $value."
";
         }
   }
   $_SESSION[&apos;lerror&apos;] = NULL;
}
?>

Hope that helps 😀