Overview
In this tutorial create 4 files
1. form_login.php
2. checklogin.php
3. login_success.php
4. logout.php
Step
1. Create table "members" in database "login".
2. Create file form_login.php.
3. Create file checklogin.php.
4. Create file login_success.php.
5. Create file logout.php
1. First time create new database with name login and create table table member
CREATE TABLE `members` (
`id` int(4) NOT NULL auto_increment,
`username` varchar(50) NOT NULL default '',
`password` varchar(50) NOT NULL default '',
PRIMARY KEY (`id`)
)
insert data to table members
INSERT INTO `members` VALUES (1, 'herri', '1234');
2. Create form_login.php, use the following code
<html>
<head><title>Login Page</title>
</head>
<body>
<table width="300" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<form name="form1" method="post" action="checklogin.php">
<td>
<table width="100%" border="0" cellpadding="3" cellspacing="1" bgcolor="#FFFFFF">
<tr>
<td colspan="3"><strong>Member Login </strong></td>
</tr><tr>
<td width="78">Username</td>
<td width="6">:</td>
<td width="294"><input name="myusername" type="text" id="myusername"></td>
</tr><tr>
<td>Password</td>
<td>:</td>
<td><input name="mypassword" type="text" id="mypassword"></td>
</tr><tr>
<td colspan="3"><input type="submit" name="Submit" value="Login"></td>
</tr>
</table>
</td>
</form>
</tr>
</table>
</body>
</html>
view in browser :
3. Create file checklogin.php, use the following code :
<?php
$host="localhost"; // Host name
$username="root"; // Mysql username
$password=""; // Mysql password
$db_name="LoginPage"; // Database name
$tbl_name="members"; // Table name
// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
// username and password sent from form
$myusername=$_POST['myusername'];
$mypassword=$_POST['mypassword'];
// To protect MySQL injection (more detail about MySQL injection)
$myusername = stripslashes($myusername);
$mypassword = stripslashes($mypassword);
$myusername = mysql_real_escape_string($myusername);
$mypassword = mysql_real_escape_string($mypassword);
$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
$result=mysql_query($sql);
// Mysql_num_row is counting table row
$count=mysql_num_rows($result);
// If result matched $myusername and $mypassword, table row must be 1 row
if($count==1){
// Register $myusername, $mypassword and redirect to file "login_success.php"
session_register("myusername");
session_register("mypassword");
header("location:login_success.php");
}
else {
echo "Wrong Username or Password";
}
?>
4. Create file login_success.php, use the following code :
<?
// Check if session is not registered , redirect back to main page.
// Put this code in first line of web page.
session_start();
if(isset($_session['myusername'])){
header("location:form_login.php");
}
?>
<html>
<body>
Login Successful<br>
<a href="logout.php">Logout</a>
</body>
</html>
view the browser :
5. Create file logout.php, use the following code :
<?
//If you want to logout, create this file
// Put this code in first line of web page.
session_start();
session_destroy();
header("location:form_login.php");
?>
Download Tutorial :
Good Luck :-)
