A PHP component ready to use to implement basic login features.
This is another
PHP component ready to use and reuse in your project which implements a "ready to use" login system with PHP. In the past week I received several emails about the difficult (from some PHP beginners) to implement this functionality in their projects, in particular for these two common issues:
- cannot maintain session value after log-in if you visit a new page
- cannot redirect an user in a specific page after the login
So I prepared this component to help everyone which have the same problems. This post is not so short... but don't worry... It's just because I want to exagerate with the words to be clear :)
Download this PHP componentBefore to startTake a quick look at the package content:
In detail:
- login-form.php contains a standard form with two fields, email and password.
- common-functions.php contains two functions: redirect and remove HTML tag from the input field
- config.php includes DB connection parameters
- login.php contains a basic query to verify if an user exists and in this case it creates a PHP session.
- logout.php contains delete session code (if you are logged-in)
I supposed your
login form has these fields:
email and
password. If login fails an error message will be displayed:
...otherwise if login is ok will be displayed a simple
logout link:
You can modify everything how you prefer customizing the code. How? Read the following paragraphs...
Step 1: include login-form.phpCreate a new PHP page (for example
index.php) in the
same folder where is
login-form.php (don't change it, ok?) :
Open
index.php and include
login-form.php where you want into the <body>tag using:
<?php include('login-form.php')?>
...in this way you are including the login form into your page. Now, add this line of code
on top of index.php before any kind of code in your page (it's important in order to mantain session created after the user login... you can't forgot it ok? Otherwise it doesn't work!):
<?php session_start(); ?>
Step 2: modify config.phpChange MySQL connection parameters in
config.php:
Step 3: modify login.phpYou have to modify some parameters in
login.php so that this component works well. In this example I used a table "USER" to store the user data (email, password, name...) so, in the line
13 in my FROM clausule there is "
USER". Change it with the name of the table you have in your database which store the user data:
It's a good practice using the
primary key value to store a session ID. At
line 19 change ID_USER_PK with the name of the primary kay you have in the user data table.
Change
line 25 and
line 31 to customizing a redirect page when an user submit the login form.
Step 4: change redirect in logout.phpLast step, modify the URL to redirect an user in a certain page after logout:
It's all! Tell me more infos if you have some problems with this component.
Download this PHP componentRelated contentPHP components: Autosuggest
Izzimenu.com
