Kamis, 03 Mei 2012

Make Login Page With Php

Learn to create a simple login system with php + mysql script, this tutorial easy to follow, teach you step by step.

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 :-)

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