session_destroy - phponwebsites.com

Showing posts with label session_destroy. Show all posts

13 Jul 2014

Send forgotten password to mail in login form using php and mysql

Already you know about validate login form with remember me and signout concepts using php. You want to know Login with remember me and signout using php and mysql.
Now see about how to send forgotten password to mail using php?. First your table contains users mail id. Just imagine this is your table:

Login form using php and mysql:

Consider the following example:

login.php:

<html>

<head>
<style type="text/css">
input{
border:1px solid olive;
border-radius:5px;
}
h1{
color:darkgreen;
font-size:22px;
text-align:center;
}
span{
color:lightgreen;

}
</style>
</head>
<body>
<h1>Login<h1>
<form action='#' method='post'>
<table cellspacing='5' align='center'>
<tr><td>User name:</td><td><input type='text' name='name'/></td></tr>
<tr><td>Password:</td><td><input type='password' name='pwd'/></td></tr>
<tr><td></td><td><input type='checkbox' name='remember' /> <span>Remember me</span></td></tr>
<tr><td></td><td> <span><a href="forgot.php">Forgot password</a></span></td></tr>
<tr><td></td><td><input type='submit' name='submit' value='Submit'/></td></tr>
</table>

</form>
<?php
session_start();
//your values are stored in cookies, then you can login without validate
if(isset($_COOKIE['name']) && isset($_COOKIE['pwd']))
{
header('location:welcome.php');
}
// login validation in php
if(isset($_POST['submit']))
{
mysql_connect('localhost','root','') or die(mysql_error());
mysql_select_db('new')  or die(mysql_error());
$name=$_POST['name'];
$pwd=$_POST['pwd'];
if($name!=''&&$pwd!='')
{
$query=mysql_query("select * from login where name='".$name."' and password='".$pwd."' ")  or die(mysql_error());
$res=mysql_fetch_row($query);
if($res)
{
if(isset($_POST['remember']))
{
  setcookie('name',$name, time() + (60*60*24*1));
  setcookie('pwd',$pwd, time() + (60*60*24*1));
}
$_SESSION['name']=$name;
header('location:welcome.php');
}
else
{
echo'You entered username or password is incorrect';
}
}
else
{
echo'Enter both username and password';
}
}
?>
</body>
</html>

While you run the above file, you'll get output like this:

Fogot password in php:

The php script for send forgotten password to mail is:

forgot.php:

<html>
<head>
<style type="text/css">
input{
border:1px solid olive;
border-radius:5px;
}
h1{
color:darkgreen;
font-size:22px;
text-align:center;
}

</style>
</head>
<body>
<h1>Forgot Password<h1>
<form action='#' method='post'>
<table cellspacing='5' align='center'>
<tr><td>Email id:</td><td><input type='text' name='mail'/></td></tr>
<tr><td></td><td><input type='submit' name='submit' value='Submit'/></td></tr>
</table>
</form>
<?php
if(isset($_POST['submit']))
{
mysql_connect('localhost','root','') or die(mysql_error());
mysql_select_db('new') or die(mysql_error());
$mail=$_POST['mail'];
$q=mysql_query("select * from login where mail='".$mail."' ") or die(mysql_error());
$p=mysql_affected_rows();
if($p!=0)
{
$res=mysql_fetch_array($q);
$to=$res['mail'];
$subject='Remind password';
$message='Your password : '.$res['password'];
$headers='From:guruparthiban19@gmail.com';
$m=mail($to,$subject,$message,$headers);
if($m)
{
echo'Check your inbox in mail';
}
else
{
echo'mail is not send';
}
}
else
{
echo'You entered mail id is not present';
}
}
?>
</body>
</html>

Where,
mysql_query("select * from login where mail='".$mail."' "); is select the values from mysql table.
mysql_affected_rows() return the number of rows selected. If it returns 0, then there is no values is present in mysql table.
mysql_fetch_array() return the results an associated array. You want to know mysql_fetch_array().
Mail() is used to send password to mail. Yow want to know mail() in php.

When you click the 'forgot password' in login page, you'll get output like this:

You entered your email id in text box and click submit button. Now you can get message 'Check your inbox in mail' if the mail is send. Otherwise, you'll get 'Mail is not send' message. If you enetered mail id which is not present is mysql table, then you will get 'You entered mail is is not present' message.

Related Post:
Create Registration form using PHP and MySQL
Login form validation using PHP and Mysql
Remember me in login form validation using PHP and Mysql

7 Jul 2014

Validate login form with remember me using php and mysql

All of you know the simple login validation concepts in php. Otherwise visit login validation using php. Now see about login form with remember me concept in php. You can remember the user using cookies concept in php.
When you click the remember me check box, your name and password is stored in cookie. Though you signout and close the browser, you can login again while open page in browser. Your name kept by cookie until expire the time or you clear the cache in your browser.

Remember me in login form using php:

Consider the following example. You have 3 php pages such as login.php, welcome.php and signout.php.

login.php:

<html>
<head>
<style type="text/css">
input{
border:1px solid olive;
border-radius:5px;
}
h1{
color:darkgreen;
font-size:22px;
text-align:center;
}
span{
color:lightgreen;

}
</style>
</head>
<body>
<h1>Login<h1>
<form action='#' method='post'>
<table cellspacing='5' align='center'>
<tr><td>User name:</td><td><input type='text' name='name'/></td></tr>
<tr><td>Password:</td><td><input type='password' name='pwd'/></td></tr>
<tr><td></td><td><input type='checkbox' name='remember' /> <span>Remember me</span></td></tr>
<tr><td></td><td><input type='submit' name='submit' value='Submit'/></td></tr>
</table>

</form>
<?php
session_start();
//your values are stored in cookies, then you can login without validate
if(isset($_COOKIE['name']) && isset($_COOKIE['pwd']))
{
header('location:welcome.php');
}
// login validation in php
if(isset($_POST['submit']))
{
mysql_connect('localhost','root','') or die(mysql_error());
mysql_select_db('new') or die(mysql_error());
$name=$_POST['name'];
$pwd=$_POST['pwd'];
if($name!=''&&$pwd!='')
{
$query=mysql_query("select * from login where name='".$name."' and password='".$pwd."' ");
$res=mysql_fetch_row($query);
if($res)
{
if(isset($_POST['remember']))
{
setcookie('name',$name, time() + (60*60*24*1));
setcookie('pwd',$pwd, time() + (60*60*24*1));
}
$_SESSION['name']=$name;
header('location:welcome.php');
}
else
{
echo'You entered username or password is incorrect';
}
}
else
{
echo'Enter both username and password';
}
}
?>
</body>
</html>

where,
if(isset($_COOKIE['name']) && isset($_COOKIE['pwd'])) {} means if the user values in cookies, then the user can login directly without login validation in php.

if(isset($_POST['remember'])){
setcookie('name',$name,time() + (60*60*24*1));
setcookie('pwd',$pwd,time() + (60*60*24*1));
}
which means, if the user click the remember me check box, then you have to store them in cookie. If you don't know about cookies in php, then visit Cookies in php.

When you run the login.php fille, you'll get output like this:

validate remember me concept in login form using php

welcome.php:

<?php
session_start();
if(isset($_COOKIE['name']))
{
echo 'Welcome: '. $_COOKIE['name'].'<br>';
}
else
{
echo 'Welcome: '. $_SESSION['name'].'<br>';
}
echo'<a href="signout.php">Singout</a>';
?>

where,
if(isset($_COOKIE['name'])){}else{} means if the values in cookie, then return name from cookie. Otherwise name return from session.

Now you enter username and password 'guru' and 'guru' without select the remember check box, you will navigate to 'welcome.php' page and get output like this:

welcome: guru
Signout

If it is wrong, then you can't login.

Signout in php:

When you click the signout.php, it destroy the session and return back to login page. The php script for signout page:
signout.php:

<?php
session_start();
session_destroy();
header('location:login.php');
?>

You select the remember me check box while login. Then you navigate to welcome.php page. Now you click the signout on welcome.php page, you can't return back to login page. Because the concept is, when you signout the page, you return back to login.php page, where you wrote the php script as like as:

if(isset($_COOKIE['name']) && isset($_COOKIE['pwd'])) {}

It means, if values in cookie, you can login again. Now you comes to login page and again login and navigates to welcome page because your values in cookies.So you are in welcome page until the cookie is expired.

Related Post:
Create Registration form using PHP and MySQL
Simple login form validation using php and mysql
Forgot password to mail in login form validation using PHP and Mysql

6 Jul 2014

Login validation using php and mysql

Everybody should see the login pages in most of websites. You should have doubt about this login form, how they validate username and password. There is nothing, just only 2 steps as follows as for login validation using php.
1. You enter username and password already registered which is stored in mysql database.
2. After you submit a button to login, it check the database values whether the username and password is correct or not using php and mysql query. The mysql query for select a values from mysql database as like this:

ie, SELECT * FROM table_name WHERE name='username' and password='password'

If it return values correctly, then you can login. Otherwise it give error message.

Simple login validation using php and mysql:

Lets see how to validate the username and password using php.

1. First you create table using mysql query like this:

CREATE TABLE login(name varchar(30), password varchar(30), PRIMARY KEY(name))

Now the table 'login' is created. The field 'name' is primary key. Because the username must be unique.

2. Then insert values into table using mysql query like this:

INSERT INTO login VALUES('guru','guru')

Now the table look like this:

3. The php script for login validation as follows as:
login.php:

<html>
<head>
<style type="text/css">
input{
border:1px solid olive;
border-radius:5px;
}
h1{
color:darkgreen;
font-size:22px;
text-align:center;
}
</style>
</head>
<body>
<h1>Login<h1>
<form action='#' method='post'>
<table cellspacing='5' align='center'>
<tr><td>User name:</td><td><input type='text' name='name'/></td></tr>
<tr><td>Password:</td><td><input type='password' name='pwd'/></td></tr>
<tr><td></td><td><input type='submit' name='submit' value='Submit'/></td></tr>
</table>

</form>
<?php
session_start();
if(isset($_POST['submit']))
{
mysql_connect('localhost','root','') or die(mysql_error());
mysql_select_db('new') or die(mysql_error());
$name=$_POST['name'];
$pwd=$_POST['pwd'];
if($name!=''&&$pwd!='')
{
$query=mysql_query("select * from login where name='".$name."' and password='".$pwd."'") or die(mysql_error());
$res=mysql_fetch_row($query);
if($res)
{
$_SESSION['name']=$name;
header('location:welcome.php');
}
else
{
echo'You entered username or password is incorrect';
}
}
else
{
echo'Enter both username and password';
}
}
?>
</body>
</html>

Where,
  if(isset($_POST['submit']){}   means run after submit a results.
  if($name!=''&&$pwd!=''){} means if either username or password is empty, it give message like as 'Enter both username and password'.
  mysql_query("select * from login where name='".$name."' and password='".$pwd."' ") select the values if the username and password is present.
$res=mysql_fetch_row($query) return row as numeric array.
You don't know about mysql_fetch_row, then visit mysql-fetch-row in mysql.
if($res){} validate the result. If it is correct, then your name is stored in session variable and also you'll navigate to 'welcome.php' page. Otherwise you'll get 'You entered username or password is incorrect' message. You want to visit Session in php.
    When you run the above file, it should be like this:

The php script for welcome page:

welcome.php:

<?php
session_start();
$name=$_SESSION['name'];
echo'welcome :'. $name.'<br>';
echo'<a href="signout.php">Signout</a>';
?>

Now you enter username and password 'guru' and 'guru', you will navigate to 'welcome.php' page and get output like this:

welcome: guru
Signout

If it is wrong, then you can't login.

Signout in php:

When you click the signout.php, it destroy the session and return back to login page. The php script for signout page:
signout.php:

<?php
session_start();
session_destroy();
header('location:login.php');
?>

session_destroy is used to destroy the session variable in php.

Related Post:
Create Registration form using PHP and MySQL
Login form validation with remember function using php and mysql
Forgot password to mail in login form validation using PHP and Mysql

22 May 2014

PHP - Session

Session is the temporary memory to store a particular value. All of you use gmail, that gmail is the bset example for session concept. If you login gmail, then close the browser. Now you open gmail in your browser, you login gmail again. Unlike, you logout from gmail and close the browser. Now you can't login again. It comes to login page. This is the session concept. The value is stored in session until you destroy the session.

Session in php:

In php, there is 3 steps for session.
1. Start the session using session_start().
2. Load values to session variable by $_SESSION['name']='Guru'.
3. Destroy the session by session_destroy() or unset($_SESSION['name']).

session_start() in php:

It is used to start the session in php. Consider folowing example in php:

<?php
session_start();
$_SESSION['name']='Guru';
echo $_SESSION['name'];
?>

Now you'll get output: Guru

Suppose you run file without session_start(). Then you'll get error message like below:

session_destroy() in php:

It is used to destroy the session. Consider following example in php:

welcome.php:

<?php
session_start();
$_SESSION['name']='Guru';
echo $_SESSION['name'].'<br>';
echo'<a href="signout.php">Signout</a>';
?>

signout.php:

<?php
session_start();
session_destroy();
header('location:welcome.php');
?>

When you run the welcome.php, your output like this:

Guru
Signout

When you click the signout, it destroy the session and navigates to welcome.php. Now you try to clikc back button on your browser, it go to welcome.php page, but the value stored in session is not displayed. It give error message like below:

unset() in php:

You can also delete the session using unset() in php. The script for unset() as follows as:

<?php
session_start();
unset($_SESSION['name']);
header('location:welcome.php');
?>

It is also give same output like session_destroy() in php.

Related Post:

PHP - Cookies
How to store values in cookie using PHP
How to retrieve values from cookies in PHP
How to delete cookies in PHP
How to store multiple values into session in PHP

Pages

13 Jul 2014

Send forgotten password to mail in login form using php and mysql

Login form using php and mysql:

Fogot password in php:

7 Jul 2014

Validate login form with remember me using php and mysql

Remember me in login form using php:

Signout in php:

6 Jul 2014

Login validation using php and mysql

Simple login validation using php and mysql:

Signout in php:

22 May 2014

PHP - Session

Session in php:

session_start() in php:

session_destroy() in php:

unset() in php: