How to create unik link in send mail using php

To create a unique link in a send mail using PHP, you can use a combination of techniques:

1. Generate a random string: Use a PHP function like uniqid() or random_bytes() to generate a random string.
2. Create a URL: Use the generated random string to create a URL that will be used as the link.
3. Store the link and its corresponding data: Store the generated link and its corresponding data (e.g., user ID, email, etc.) in a database or a session.

Here's an example code snippet that demonstrates how to create a unique link:

<?php

// Generate a random string
$random_string = uniqid();

// Create a URL
$url = 'https://example.com/verify-email?token='. $random_string;

// Store the link and its corresponding data in a database or session
// For example, let's assume we're using a database
$db = mysqli_connect('localhost', 'username', 'password', 'database');
if (!$db) {
    die('Error connecting to database');
}

$query = "INSERT INTO email_verifications (email, token) VALUES ('$email', '$random_string')";
mysqli_query($db, $query);

// Send the email with the unique link
$mail = new PHPMailer();
$mail->setFrom('[email protected]');
$mail->addAddress('[email protected]');
$mail->Subject = 'Verify your email';
$mail->Body = 'Please click on the following link to verify your email: '. $url;
$mail->send();

?>

In this example, we generate a random string using uniqid() and create a URL by concatenating the random string with a base URL. We then store the link and its corresponding data (email) in a database. Finally, we send an email with the unique link to the user.

When the user clicks on the link, you can verify the token in your database to ensure it matches the one stored for that user's email. If it matches, you can consider the email verified.

Remember to secure your database and email verification process to prevent abuse and ensure the integrity of your system.