LOIGN-MODULE-CODE-IN-PHP
Login Module With Session Management:
(1)First create databse & table & insert values for username & password:
Create database amrapali;
Create table user
(id int primary key auto_increment,
username varchar(20),
password varchar(20));
(1) Write html code for “Loginform.html” file , CODE IS GIVEN BELOW:
<html>
<head>
<title>
login example
</title>
</head>
<body>
<form action="login.php" method="post">
username <input type=text name="username">
Password <input type=text name="password">
<input type="submit" name="submit" value="submit">
</body>
</html>
(2)write php code which will check username & password “login.php” file CODE IS GIVEN BELOW:
<?php
$con=mysqli_connect("Localhost","root","","amrapali");
$username=$_POST['username'];
$password=$_POST['password'];
$sql="select username , password from user where username='$username' AND password='$password'";
$result=mysqli_query($con,$sql);
$num=mysqli_num_rows($result);
if($num>0)
{
session_start();
$_SESSION['username']=$username;
header('Location:welcome.php');
}
else
{
echo "invalid login";
}
?>
(3)AFTER LOGIN page will display that is “welcome.php”:
<?php
session_start();
if(!isset($_SESSION['username']))
{
header("Location:error.php");
}
echo "<h1>welcome </h1>";
echo '<a href="logout.php">Logout</a>';
?>
(4)logout.php file this file destroy session:
<?php
session_start();
session_destroy();
header("Location:loginform.html");
?>
(5)error.php file:
<?php
echo "first make login ";
echo '<a href="loginform.html">Login here</a>';
?>
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