Signup and login pages

This repository contains signup and login pages in PHP which use MySQL database.

Setup

To use this, copy contents of src folder to your web server root (assuming you have LAMP, WAMP or MAMP setup. if not, do it first.)

You have to create a MySQL user named 'user' and password 'password' (which you can change in php files in src)

To do this, run mysql server in a command line shell and enter following SQL:

CREATE USER 'user'@'localhost' IDENTIFIED BY 'password';

GRANT ALL PRIVILEGES ON *.* TO 'user'@'localhost';

FLUSH PRIVILEGES;

You also have to create a database named login and a table named list by entering following SQL commands:

CREATE DATABASE login;

USE login;

CREATE TABLE list (
    id int not null auto_increment,
    user_name varchar(255) not null,
    first_name varchar(255) not null,
    last_name varchar(255) not null,
    email varchar(255) not null,
    password varchar(255) not null,
    PRIMARY KEY (id)
);

About

The directory src contains 3 PHP files:

signup.php
login.php
success.php

signup.php returns a html form to user and on submit, validates it using regular expressions. It then connects to mysql server and checks for duplicate username or email and finally inserts entry for new user in database, starts a new session by initializing session variables and takes to success.php.

login php returns a form to client and on submitting, fetches data from database by username and compares passwords and if passwords match, starts a new session and takes to success.php.

success.php greets user and retains user session started in signup.php or login.php. If user clicks logout, current session is destroyed and user is taken to login.php. If session variables are not set or username in session variables is not in database or password doesn't match, this page redirects to login.php and so, this page can't be accessed without logging in with valid details.

Also, these scripts use prepared SQL statements preventing SQL injection. The HTML forms in these pages also contain some basic CSS style.