PHP Code:
/* Unset PHP session variables */
unset($_SESSION['username']);
unset($_SESSION['userid']);
/* Reflect fact that user has logged out */
$this->logged_in = false;
/**
* Remove from active users table and add to
* active guests tables.
*/
$database->removeActiveUser($this->username);
$database->addActiveGuest($_SERVER['REMOTE_ADDR'], $this->time);
/* Set user level to guest */
$this->username = GUEST_NAME;
$this->userlevel = GUEST_LEVEL;
}
/**
* register - Gets called when the user has just submitted the
* registration form. Determines if there were any errors with
* the entry fields, if so, it records the errors and returns
* 1. If no errors were found, it registers the new user and
* returns 0. Returns 2 if registration failed.
*/
function register($subuser, $subpass, $subemail){
global $database, $form, $mailer; //The database, form and mailer object
/* Username error checking */
$field = "user"; //Use field name for username
if(!$subuser || strlen($subuser = trim($subuser)) == 0){
$form->setError($field, "* Username not entered");
}
else{
/* Spruce up username, check length */
$subuser = stripslashes($subuser);
if(strlen($subuser) < 5){
$form->setError($field, "* Username below 5 characters");
}
else if(strlen($subuser) > 30){
$form->setError($field, "* Username above 30 characters");
}
/* Check if username is not alphanumeric */
else if(!eregi("^([0-9a-z])+$", $subuser)){
$form->setError($field, "* Username not alphanumeric");
}
/* Check if username is reserved */
else if(strcasecmp($subuser, GUEST_NAME) == 0){
$form->setError($field, "* Username reserved word");
}
/* Check if username is already in use */
else if($database->usernameTaken($subuser)){
$form->setError($field, "* Username already in use");
}
/* Check if username is banned */
else if($database->usernameBanned($subuser)){
$form->setError($field, "* Username banned");
}
}
/* Password error checking */
$field = "pass"; //Use field name for password
if(!$subpass){
$form->setError($field, "* Password not entered");
}
else{
/* Spruce up password and check length*/
$subpass = stripslashes($subpass);
if(strlen($subpass) < 4){
$form->setError($field, "* Password too short");
}
/* Check if password is not alphanumeric */
else if(!eregi("^([0-9a-z])+$", ($subpass = trim($subpass)))){
$form->setError($field, "* Password not alphanumeric");
}
/**
* Note: I trimmed the password only after I checked the length
* because if you fill the password field up with spaces
* it looks like a lot more characters than 4, so it looks
* kind of stupid to report "password too short".
*/
}
/* Email error checking */
$field = "email"; //Use field name for email
if(!$subemail || strlen($subemail = trim($subemail)) == 0){
$form->setError($field, "* Email not entered");
}
else{
/* Check if valid email address */
$regex = "^[_+a-z0-9-]+(\.[_+a-z0-9-]+)*"
."@[a-z0-9-]+(\.[a-z0-9-]{1,})*"
."\.([a-z]{2,}){1}$";
if(!eregi($regex,$subemail)){
$form->setError($field, "* Email invalid");
}
$subemail = stripslashes($subemail);
}
/* Errors exist, have user correct them */
if($form->num_errors > 0){
return 1; //Errors with form
}
/* No errors, add the new account to the */
else{
if($database->addNewUser($subuser, md5($subpass), $subemail)){
if(EMAIL_WELCOME){
$mailer->sendWelcome($subuser,$subemail,$subpass);
}
return 0; //New user added succesfully
}else{
return 2; //Registration attempt failed
}
}
}
/**
* editAccount - Attempts to edit the user's account information
* including the password, which it first makes sure is correct
* if entered, if so and the new password is in the right
* format, the change is made. All other fields are changed
* automatically.
*/
function editAccount($subcurpass, $subnewpass, $subemail){
global $database, $form; //The database and form object
/* New password entered */
if($subnewpass){
/* Current Password error checking */
$field = "curpass"; //Use field name for current password
if(!$subcurpass){
$form->setError($field, "* Current Password not entered");
}
else{
/* Check if password too short or is not alphanumeric */
$subcurpass = stripslashes($subcurpass);
if(strlen($subcurpass) < 4 ||
!eregi("^([0-9a-z])+$", ($subcurpass = trim($subcurpass)))){
$form->setError($field, "* Current Password incorrect");
}
/* Password entered is incorrect */
if($database->confirmUserPass($this->username,md5($subcurpass)) != 0){
$form->setError($field, "* Current Password incorrect");
}
}
/* New Password error checking */
$field = "newpass"; //Use field name for new password
/* Spruce up password and check length*/
$subpass = stripslashes($subnewpass);
if(strlen($subnewpass) < 4){
$form->setError($field, "* New Password too short");
}
/* Check if password is not alphanumeric */
else if(!eregi("^([0-9a-z])+$", ($subnewpass = trim($subnewpass)))){
$form->setError($field, "* New Password not alphanumeric");
}
}
/* Change password attempted */
else if($subcurpass){
/* New Password error reporting */
$field = "newpass"; //Use field name for new password
$form->setError($field, "* New Password not entered");
}
/* Email error checking */
$field = "email"; //Use field name for email
if($subemail && strlen($subemail = trim($subemail)) > 0){
/* Check if valid email address */
$regex = "^[_+a-z0-9-]+(\.[_+a-z0-9-]+)*"
."@[a-z0-9-]+(\.[a-z0-9-]{1,})*"
."\.([a-z]{2,}){1}$";
if(!eregi($regex,$subemail)){
$form->setError($field, "* Email invalid");
}
$subemail = stripslashes($subemail);
}
/* Errors exist, have user correct them */
if($form->num_errors > 0){
return false; //Errors with form
}
/* Update password since there were no errors */
if($subcurpass && $subnewpass){
$database->updateUserField($this->username,"password",md5($subnewpass));
}
/* Change Email */
if($subemail){
$database->updateUserField($this->username,"email",$subemail);
}
/* Success! */
return true;
}
/**
* isAdmin - Returns true if currently logged in user is
* an administrator, false otherwise.
*/
function isAdmin(){
return ($this->userlevel == ADMIN_LEVEL ||
$this->username == ADMIN_NAME);
}
/**
* generateRandID - Generates a string made up of randomized
* letters (lower and upper case) and digits and returns
* the md5 hash of it to be used as a userid.
*/
function generateRandID(){
return md5($this->generateRandStr(16));
}
/**
* generateRandStr - Generates a string made up of randomized
* letters (lower and upper case) and digits, the length
* is a specified parameter.
*/
function generateRandStr($length){
$randstr = "";
for($i=0; $i<$length; $i++){
$randnum = mt_rand(0,61);
if($randnum < 10){
$randstr .= chr($randnum+48);
}else if($randnum < 36){
$randstr .= chr($randnum+55);
}else{
$randstr .= chr($randnum+61);
}
?>
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