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Login PHP Script Tutorial

Jun 29, 2011   //   by legles   //   Tutorials  //  No Comments

Steps

  1. Create database called ‘test’
  2. Create table called ‘users’ in database  called ‘test’
  3. Create file called login_page.php
  4. Create file called login_verifier.php
  5. Create file called login_success.php
  6. Create file called logout.php

step oneStep one

See database tutorials

step twoStep two

Creating “users” table in MySQL

CREATE TABLE `users` (
`id` int(4) NOT NULL auto_increment,
`username` varchar(65) NOT NULL default ”,
`password` varchar(65) NOT NULL default ”,
PRIMARY KEY (`id`)
) TYPE=MyISAM AUTO_INCREMENT=2 ;

Inserting data into the “users” table

INSERT INTO `users` VALUES (1, ‘donkey’, ’123456′);

step threeStep three

Creating  file called login_verifier.php

A view of the log in form

loginpage

################ html form codes

<table width=”300″ border=”0″ align=”center” cellpadding=”0″ cellspacing=”1″ bgcolor=”#CCCCCC”>
<tr>
<form name=”form1″ method=”post” action=”login_verifier.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>&nbsp;</td>
<td>&nbsp;</td>
<td><input type=”submit” name=”Submit” value=”Login”></td>
</tr>
</table>
</td>
</form>
</tr>
</table>

step fourStep four

Creating  file called login_verifier.php

############### Php script

<?php
$host=”localhost”; // Host name
$username=”"; // Mysql username
$password=”"; // Mysql password
$db_name=”test”; // Database name
$tbl_name=”users”; // 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
$myusername = stripslashes($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”;
}
?>

step fiveStep five

Creating  file called login_success.php

############### html and php script

// Check if session is not registered , redirect back to main page.
// Put this code in first line of web page.
<?
session_start();
if(!session_is_registered(myusername)){
header(“location:main_login.php”);
}
?>

<html>
<body>
Login Successful
</body>
</html>

step sixStep six

Creating  file called logout.php

##############  codes for logging out of the login_success.php page

<?
session_start();
session_destroy();
?>

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