How can PHP developers implement a Double-Opt-In process for email verification in their applications?

To implement a Double-Opt-In process for email verification in PHP applications, developers can send a verification email with a unique token to the user's email address. Upon clicking the verification link, the user's email address is confirmed, and the account is activated. This process ensures that the user intentionally wants to verify their email address and reduces the chances of fake or mistyped email addresses being used. 

// Generate a unique token
$token = md5(uniqid(rand(), true));

// Save the token in the database along with the user's email address
// Send an email to the user with a verification link containing the token
$verification_link = "http://www.example.com/verify.php?email=" . urlencode($email) . "&token=" . $token;

// When the user clicks the verification link, check if the token matches the one stored in the database
if ($_GET['token'] == $token) {
    // Activate the user's account
    // Update the database to mark the email address as verified
    echo "Email address verified successfully!";
} else {
    echo "Invalid verification token!";
}

Keywords

PHP Double-Opt-In email verification implementation applications

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