Web-development informational articles

Increasing a login coordination with php and mysql - web-development

 

Most interactive websites currently would command a user to log in into the website's arrangement in order to bestow a custom-made be subjected to for the user. Once the user has logged in, the website will be able to bestow a presentation that is tailored to the user's preferences.

A basic login classification typically contains 3 components:

1. The element that allows a user to catalog his ideal login id and password

2. The element that allows the coordination to verify and confirm the user when he subsequently logs in

3. The constituent that sends the user's password to his registered email adopt if the user forgets his password

Such a approach can be by far fashioned using PHP and MySQL.

================================================================

Component 1 - Registration

Component 1 is typically implemented using a austere HTML form that contains 3 fields and 2 buttons:

1. A favorite login id field
2. A favored password field
3. A valid email attend to field
4. A Accept button
5. A Reset button

Assume that such a form is coded into a file named register. html. The subsequent HTML code piece is a archetypal example. When the user has full in all the fields, the register. php page is called when the user clicks on the Acquiesce button.

[form name="register" method="post" action="register. php"]

[input name="login id" type="text" value="loginid" size="20"/][br]

[input name="password" type="text" value="password" size="20"/][br]

[input name="email" type="text" value="email" size="50"/][br]

[input type="submit" name="submit" value="submit"/]

[input type="reset" name="reset" value="reset"/] [/form]

The next code citation can be used as part of register. php to administer the registration. It connects to the MySQL list and inserts a line of data into the table used to store the registration information.

@mysql_connect("localhost", "mysql_login", "mysql_pwd") or die("Cannot bond to DB!"); @mysql_select_db("tbl_login") or die("Cannot choice DB!"); $sql="INSERT INTO login_tbl (loginid, password and email) Ethics (". $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 morals of the $loginid, $password and $email variables are conceded in from the form in register. html using the post method.

================================================================

Component 2 - Verification and Authentication

A registered user will want to log into the arrangement to contact the functionality provided by the website. The user will have to give his login id and password for the coordination to verify and authenticate.

This is typically done all through a clean HTML form. This HTML form typically contains 2 fields and 2 buttons:

1. A login id field
2. A password field
3. A Acquiesce button
4. A Reset button

Assume that such a form is coded into a file named authenticate. html. The subsequent HTML code citation is a archetypal example. When the user has crammed in all the fields, the authenticate. php page is called when the user clicks on the Acquiesce button.

[form name="authenticate" method="post" action="authenticate. php"]

[input name="login id" type="text" value="loginid" size="20"/][br]

[input name="password" type="text" value="password" size="20"/][br]

[input type="submit" name="submit" value="submit"/]

[input type="reset" name="reset" value="reset"/] [/form]

The subsequent code passage can be used as part of authenticate. php to course of action the login request. It connects to the MySQL catalog and queries the table used to store the registration information.

@mysql_connect("localhost", "mysql_login", "mysql_pwd") or die("Cannot bond to DB!"); @mysql_select_db("tbl_login") or die("Cannot choice 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 in the system. choose try again. ";

exit(); } else{

print "successfully logged into system. ";

//proceed to act website's functionality - e. g. acquaint with in rank to the user }

As in element 1, the code piece 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 ideals of the $loginid and $password variables are conceded in from the form in authenticate. html using the post method.

================================================================

Component 3 - Forgot Password

A registered user may not recall his password to log into the website's system. In this case, the user will need to contribute his loginid for the arrangement to retrieve his password and send the password to the user's registered email address.

This is typically done because of a clear-cut HTML form. This HTML form typically contains 1 field and 2 buttons:

1. A login id field
2. A Acquiesce button
3. A Reset button

Assume that such a form is coded into a file named forgot. html. The subsequent HTML code passage is a characteristic example. When the user has packed in all the fields, the forgot. php page is called when the user clicks on the Agree to button.

[form name="forgot" method="post" action="forgot. php"]

[input name="login id" type="text" value="loginid" size="20"/][br]

[input type="submit" name="submit" value="submit"/]

[input type="reset" name="reset" value="reset"/] [/form]

The subsequent code citation can be used as part of forgot. php to course the login request. It connects to the MySQL file and queries the table used to store the registration information.

@mysql_connect("localhost", "mysql_login", "mysql_pwd") or die("Cannot bond to DB!"); @mysql_select_db("tbl_login") or die("Cannot cliquey 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()==0){

print "no such login in the system. entertain 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 factor 1, the code citation 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 value of the $loginid alterable is agreed from the form in forgot. html using the post method.

================================================================

Conclusion

The above case in point is to illustrate how a very basic login approach can be implemented. The exemplar can be enhanced to comprise password encryption and further functionality - e. g. to allow users to edit their login information.

Used with the author's permission.
This commentary is on paper by John L.
John L is the Webmaster of Designer Banners (http://www. designerbanners. com).


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