Reset password – PHP & MySQL
We will be using 4 files to implement reset password option.
- index.php (to get email address)
- send-recovery-mail.php (to send email)
- reset-password.php (to enter new password)
- new-password.php (to update the password)
Your table structure should be like this:
You need to create a table in database called users and the most important columns are email and reset_token. Sending email via localhost requires an Gmail account and you need to enable less secure apps for your account. You can enable it from the link below:
Enter email address
Create a simple form to get user’s email address, where recovery mail should be sent.
<form method="POST" action="send-recovery-mail.php">
<input type="email" name="email">
<input type="submit" value="Send recovery email">
</form>
Send recovery email
We will be using PHPMailer library, you can download it from the link below:
Download PHPMailer
Next you need to include the library and make a connection with database:
<?php
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;
require 'vendor/autoload.php';
$connection = mysqli_connect("localhost", "root", "", "classicmodels");
First you need to check if a user of that email exists in your database:
$email = $_POST["email"];
$sql = "SELECT * FROM users WHERE email = '$email'";
$result = mysqli_query($connection, $sql);
if (mysqli_num_rows($result) > 0)
{
//
}
else
{
echo "Email does not exists";
}
Inside the if statement, you need to generate a unique token which will be sent in email:
if (mysqli_num_rows($result) > 0)
{
$reset_token = time() . md5($email);
}
else
{
echo "Email does not exists";
}
After that, you need to save this token against that user’s database record:
$sql = "UPDATE users SET reset_token='$reset_token' WHERE email='$email'";
mysqli_query($connection, $sql);
Then you create a variable called $message and write all the text that you want to send in recovery email:
$message = "<p>Please click the link below to reset your password</p>";
$message .= "<a href='http://localhost/tutorials/add-a-reset-password-option/reset-password.php?email=$email&reset_token=$reset_token'>";
$message .= "Reset password";
$message .= "</a>";
- Replace your web URL with the highlighted text.
Now, simply send the email via PHPMailer. We have created a separate function to do that:
function send_mail($to, $subject, $message)
{
$mail = new PHPMailer(true);
try {
//Server settings
$mail->SMTPDebug = 0; // Enable verbose debug output
$mail->isSMTP(); // Set mailer to use SMTP
$mail->Host = 'smtp.gmail.com;'; // Specify main and backup SMTP servers
$mail->SMTPAuth = true; // Enable SMTP authentication
$mail->Username = 'your_gmail_address'; // SMTP username
$mail->Password = 'your_gmail_password'; // SMTP password
$mail->SMTPSecure = 'tls'; // Enable TLS encryption, `ssl` also accepted
$mail->Port = 587; // TCP port to connect to
$mail->setFrom('your_gmail_address', 'your_name');
//Recipients
$mail->addAddress($to);
// Content
$mail->isHTML(true); // Set email format to HTML
$mail->Subject = $subject;
$mail->Body = $message;
$mail->send();
echo 'Message has been sent';
} catch (Exception $e) {
echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
}
}
And you can call this function right after$message variable:
send_mail($email, "Reset password", $message);
At this point, when you enter email and hit submit you will receive an email with a receovery link. On clicking you will be redirected to your site on page reset-password.php.
Enter new password
Now you need to create a file named reset-password.php. In this file, first you need to check if it comes from email link:
<?php
$email = $_GET["email"];
$reset_token = $_GET["reset_token"];
$connection = mysqli_connect("localhost", "root", "", "classicmodels");
$sql = "SELECT * FROM users WHERE email = '$email'";
$result = mysqli_query($connection, $sql);
if (mysqli_num_rows($result) > 0)
{
//
}
else
{
echo "Email does not exists";
}
Second, you need to check if the token is not tempered, so that you cannot change someone else’s password:
$user = mysqli_fetch_object($result);
if ($user->reset_token == $reset_token)
{
//
}
else
{
echo "Recovery email has been expired";
}
Third, display a simple form to enter new password. The email and reset_token needs to be hidden in this file so that you can update password for only that specific user:
if ($user->reset_token == $reset_token)
{
?>
<form method="POST" action="new-password.php">
<input type="hidden" name="email" value="<?php echo $email; ?>">
<input type="hidden" name="reset_token" value="<?php echo $reset_token; ?>">
<input type="password" name="new_password" placeholder="Enter new password">
<input type="submit" value="Change password">
</form>
<?php
}
else
{
echo "Recovery email has been expired";
}
Reset the password
Now you only needs to create a new file named new-password.php and paste the following code in it:
<?php
$email = $_POST["email"];
$reset_token = $_POST["reset_token"];
$new_password = $_POST["new_password"];
$connection = mysqli_connect("localhost", "root", "", "classicmodels");
$sql = "SELECT * FROM users WHERE email = '$email'";
$result = mysqli_query($connection, $sql);
if (mysqli_num_rows($result) > 0)
{
$user = mysqli_fetch_object($result);
if ($user->reset_token == $reset_token)
{
$sql = "UPDATE users SET password='$new_password' WHERE email='$email' AND reset_token='$reset_token'";
mysqli_query($connection, $sql);
echo "Password has been changed";
}
else
{
echo "Recovery email has been expired";
}
}
else
{
echo "Email does not exists";
}
That’s how you can reset password using PHP and MySQL. Learn also how you can do email verification in your website.
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