Many interactive websites nowadays need a user to log in into the web site’s system to provide a customized experience for the user. Once the user has logged in, the website will be ready to supply a presentation that’s customized to the user’s preferences.
A basic login system usually contains three parts which can be created using PHP and MySQL :
Part 1: Permits registration of most well-liked login Id and password.
This is created in straightforward HTML kind that contains three fields and 2 buttons:
1. A preferred login id field
2. A preferred password field
3. A valid email address field
4. A Submit button
5. A Reset button
Shall we say the shape is coded into a file named register.html. The subsequent HTML code extract is a typical example. When the user has stuffed 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" kind="text" price="loginid" size="20"/][br]
[input name="password" kind="text" price="password" size="20"/][br]
[input name="email" kind="text" price="email" size="50"/][br]
[input kind="submit" name="submit" price="submit"/]
[input type="reset" name="reset" value="reset"/]
[/kind]
The following code extract will additionally be used as half of register.php to method the registration. The code connects to the MySQL database and inserts a line of information 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 information is called 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 shape in register.html using the post method.
Component two: Verification and authentication of the user.
During this the HTML kind sometimes contains a pair of fields and 2 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 could 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" price="loginid" size="20"/][br]
[input name="password" kind="text" price="password" size="20"/][br]
[input sort="submit" name="submit" value="submit"/]
[input sort="reset" name="reset" price="reset"/]
[/type]
The following code extract will be used as part of authenticate.php to process 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()==0){
print “no such login within the system. please strive again.”;
exit();
}
else{
print “successfully logged into system.”;
//proceed to perform website’s functionality – e.g. gift information to the user
}
As in component one, the code excerpt assumes {that the} MySQL table that’s used to store the registration information is known as 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 shape in authenticate.html using the post method.
Element three: When the user forgets his logion password this third component sends his password to the users registered email address.
The HTML type sometimes contains one 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 is a typical example. When the user has stuffed in all the fields, the forgot.php page is termed when the user clicks on the Submit button.
[form name="forgot" methodology="post" action="forgot.php"]
[input name="login id" kind="text" price="loginid" size="twenty"/][br]
[input kind="submit" name="submit" price="submit"/]
[input type="reset" name="reset" value="reset"/]
[/kind]
The subsequent 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 connect to DB!”);
@mysql_select_db(”tbl_login”) or die(”Cannot select 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 try 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 component 1, the code excerpt assumes {that the} MySQL table that is used to store the registration knowledge is named tbl_login and contains 3 fields – the loginid, password and email fields. The price of the $loginid variable is passed from the shape in forgot.html using the post method.
This is how a basic login system can be created. The software developer will embody further 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 which pulls material specialists from completely different work domains. They can be contacted through the Pegasus InfoCorp web site at information@pegasusinfocorp.com. Pegasus InfoCorp is an India based mostly web design, internet development and on-line/offline software development company. Please visit http://www.pegasusinfocorp.com to browse a lot of articles and apprehend more about us!
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