Several interactive websites nowadays require a user to log in into the website’s system to supply a customized experience for the user. Once the user has logged in, the website will be ready to produce a presentation that is personalized to the user’s preferences.

A basic login system typically contains three parts which will be created using PHP and MySQL :

Component 1: Allows registration of most popular login Id and password.

This can be created in simple HTML form that contains three fields and 2 buttons:

1. A preferred login id field

2. A most popular password field

3. A valid email address field

4. A Submit button

5. A Reset button

Let’s imagine the shape is coded into a file named register.html. The subsequent HTML code extract is a typical example. When the user has filled in all the fields and clicks on the submit button, the register.php page is called for.

[kind name="register" methodology="post" action="register.php"]
[input name="login id" type="text" price="loginid" size="20"/][br]
[input name="password" kind="text" price="password" size="20"/][br]
[input name="email" type="text" value="email" size="fifty"/][br]
[input sort="submit" name="submit" price="submit"/]
[input type="reset" name="reset" worth="reset"/]
[/form]

The following code extract can also be used as half of register.php to process the registration. The code connects to the MySQL database and inserts a line of knowledge into the table used to store the registration information.

@mysql_connect(“localhost”, “mysql_login”, “mysql_pwd”) or die(“Cannot connect to DB!”);
@mysql_select_db(“tbl_login”) or die(“Cannot choose DB!”);
$sql=”INSERT INTO login_tbl (loginid, password and email) VALUES (“.$loginid.”,”.$password.”,”.$email.”)”;
$r = mysql_query($sql);
if(!$r) {
$err=mysql_error();
print $err;
exit();
}

The code extract assumes {that the} MySQL table that is used to store the registration data is named tbl_login and contains 3 fields – the loginid, password and email fields. The values of the $loginid, $password and $email variables are passed in from the form in register.html using the post method.

Element 2: Verification and authentication of the user.

In this the HTML type typically contains two fields and a pair of buttons:

1. A login id field

2. A password field

3. A Submit button

4. A Reset button

Assume that such a form is coded into a file named authenticate.html. The following HTML code extract may be a typical example. When the user has crammed in all the fields, the authenticate.php page is called when the user clicks on the Submit button.

[type name="authenticate" technique="post" action="authenticate.php"]
[input name="login id" type="text" value="loginid" size="20"/][br]
[input name="password" sort="text" price="password" size="20"/][br]
[input kind="submit" name="submit" value="submit"/]
[input kind="reset" name="reset" price="reset"/]
[/kind]

The subsequent code extract can be used as part of authenticate.php to method the login request. It connects to the MySQL database and queries the table used to store the registration information.

@mysql_connect(“localhost”, “mysql_login”, “mysql_pwd”) or die(“Cannot connect to DB!”);
@mysql_select_db(“tbl_login”) or die(“Cannot choose DB!”);
$sql=”SELECT loginid FROM login_tbl WHERE loginid=’”.$loginid.”‘ and password=’”.$password.”‘”;
$r = mysql_query($sql);
if(!$r) {
$err=mysql_error();
print $err;
exit();
}
if(mysql_affected_rows()==zero){
print “no such login within the system. please attempt again.”;
exit();
}
else{
print “successfully logged into system.”;
//proceed to perform website’s functionality – e.g. present info to the user
}

As in component one, the code excerpt assumes {that the} MySQL table that’s used to store the registration knowledge is called tbl_login and contains three fields – the loginid, password and email fields. The values of the $loginid and $password variables are passed in from the form in authenticate.html using the post method.

Part 3:  When the user forgets his logion password this 3rd element sends his password to the users registered email address.

The HTML type typically contains 1 field and a pair of buttons:

•  A login id field
•  A Submit button
•  A Reset button

Assume that such a form is coded into a file named forgot.html. The following HTML code excerpt may be a typical example. When the user has crammed in all the fields, the forgot.php page is named when the user clicks on the Submit button.

[form name="forgot" method="post" action="forgot.php"]
[input name="login id" kind="text" price="loginid" size="twenty"/][br]
[input type="submit" name="submit" worth="submit"/]
[input type="reset" name="reset" worth="reset"/]
[/form]

The following code excerpt can be used as half of forgot.php to method the login request. It connects to the MySQL database and queries the table used to store the registration information.

@mysql_connect(“localhost”, “mysql_login”, “mysql_pwd”) or die(“Cannot hook up with DB!”);
@mysql_select_db(“tbl_login”) or die(“Cannot choose DB!”);
$sql=”SELECT password, email FROM login_tbl WHERE loginid=’”.$loginid.”‘”;
$r = mysql_query($sql);
if(!$r) {
$err=mysql_error();
print $err;
exit();
}
if(mysql_affected_rows()==zero){
print “no such login in the system. please attempt again.”;
exit();
}
else {
$row=mysql_fetch_array($r);
$password=$row["password"];
$email=$row["email"];

$subject=”your password”;
$header=”from:you@yourdomain.com”;
$content=”your password is “.$password;
mail($email, $subject, $row, $header);

print “An email containing the password has been sent to you”;
}

As in part one, the code excerpt assumes {that the} MySQL table that is used to store the registration information is known as tbl_login and contains 3 fields – the loginid, password and email fields. The value of the $loginid variable is passed from the shape in forgot.html using the post method.

This is often how a basic login system can be created. The software developer will include additional tools like password encryption, access to the user profile in case they wish to edit their profile etc.

This article has been compiled by the content development team at Pegasus InfoCorp that pulls material specialists from different work domains. They’ll be contacted through the Pegasus InfoCorp web site at info@pegasusinfocorp.com. Pegasus InfoCorp is an India primarily based web design, web development and on-line/offline software development company. Please visit http://www.pegasusinfocorp.com to read a lot of articles and recognize more regarding us!

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