What is the purpose of using an opt-in script without a database in PHP?

When using an opt-in script without a database in PHP, the purpose is to collect user email addresses for a mailing list without the need for a database to store the information. This can be useful for smaller websites or projects that do not require a full database setup. 

<?php

if($_SERVER["REQUEST_METHOD"] == "POST" && isset($_POST["email"])) {
    $email = $_POST["email"];
    
    // Save the email address to a text file
    $file = "emails.txt";
    file_put_contents($file, $email . PHP_EOL, FILE_APPEND);
    
    echo "Thank you for subscribing!";
}

?>

<form method="post">
    <input type="email" name="email" placeholder="Enter your email" required>
    <button type="submit">Subscribe</button>
</form>

Keywords

opt-in script database PHP data storage user consent

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