Click here to Skip to main content
15,302,403 members
Articles / Database Development / MySQL
Technical Blog
Posted 9 Oct 2012

Tagged as


3 bookmarked

PHP MySQL Login Form

Rate me:
Please Sign up or sign in to vote.
4.00/5 (7 votes)
9 Oct 2012CPOL1 min read
In this tutorial, you will learn how to create a login form for your website using PHP and MySQL.


In this tutorial, you will learn how to create a login form for your website using PHP and MySQL. This tutorial will be very basic, and very brief. It is to show the simplest way to have a user login to your website.

Login Form using PHP and MySQL

Generally, it is mandatory to have a user login form in a website if you only want people with certain credentials view your content. It is a good way to keep your data secure from those who it is not intended for. Do you remember one of our previous tutorials on saving data to a database. Well, we will use that same data and that same users table.

Since we already have our table created and stored data in it: See here: Save Records, we will query that same table for what the user has input on the login form.

Now let’s create the login form.


<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Jotorres Login Form</title>
    <form method="post" action="validate_login.php" >
        <table border="1" >
                <td><label for="users_email">Email</label></td>
                <td><input type="text" 
                  name="users_email" id="users_email"></td>
                <td><label for="users_pass">Password</label></td>
                <td><input name="users_pass" 
                  type="password" id="users_pass"></input></td>
                <td><input type="submit" value="Submit"/>
                <td><input type="reset" value="Reset"/>

Now that we have the login form created, let’s go ahead and create the actual file for validation.



// Grab User submitted information
$email = $_POST["users_email"];
$pass = $_POST["users_pass"];

// Connect to the database
$con = mysql_connect("localhost","root","");
// Make sure we connected successfully
if(! $con)
    die('Connection Failed'.mysql_error());

// Select the database to use

$result = mysql_query("SELECT users_email, users_pass FROM users WHERE users_email = $email");

$row = mysql_fetch_array($result);

if($row["users_email"]==$email && $row["users_pass"]==$pass)
    echo"You are a validated user.";
    echo"Sorry, your credentials are not valid, Please try again.";

If the username and password both are correct, then the output will be:

You are a validated user.

If any one of the fields or both are incorrect, then the output will be:

Sorry, your credentials are not valid. Please try again.


In the form of exercise, since we are little by little becoming PHP experts, you need to identify where this script would be vulnerable. Also, give reference to what you can do to prevent attacks.

Hints: SQL injection, mysql_real_escape_string, filter_var() with FILTER_SANITIZE_? I basically gave you more than what you need to answer those questions.

This article was originally posted at


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Software Developer
Puerto Rico Puerto Rico
As a computer scientist, I strive to learn more everyday in my field. Everything I learn, I share with my community by writing articles for future references.

Comments and Discussions

Questionlogin page Pin
Member 1372988316-Mar-18 0:20
MemberMember 1372988316-Mar-18 0:20 
Bugim getting error in mysql_fetch_array () Pin
Member 1297244028-Jan-17 23:51
MemberMember 1297244028-Jan-17 23:51 
Member 120405577-Oct-15 6:25
MemberMember 120405577-Oct-15 6:25 
Questionthe query contains an error $email should be single quoted as it varchar, check this Pin
Member 1156737730-Mar-15 6:20
MemberMember 1156737730-Mar-15 6:20 
Questionphp login Pin
Member 111388758-Oct-14 8:04
MemberMember 111388758-Oct-14 8:04 
Questionotr Pin
Member 109708327-Aug-14 0:02
MemberMember 109708327-Aug-14 0:02 
GeneralMy vote of 3 Pin
nikhilgeo25-Jan-14 10:23
Membernikhilgeo25-Jan-14 10:23 
GeneralRe: My vote of 3 Pin
Member 1091144930-Jun-14 22:35
MemberMember 1091144930-Jun-14 22:35 
QuestionCorrections..! Pin
nikhilgeo25-Jan-14 10:22
Membernikhilgeo25-Jan-14 10:22 
GeneralMy vote of 1 Pin
Roger Landolt13-Oct-12 6:35
MemberRoger Landolt13-Oct-12 6:35 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.