<form method="post" action="<?= site_url('admin/users/send_email') ?>">
    <label for="subject">Subject:</label><br>
    <input type="text" id="subject" name="subject" required><br><br>

    <label for="message">Message:</label><br>
    <textarea id="message" name="message" rows="4" cols="50" required></textarea><br><br>

    <input type="submit" value="Send Email">
</form>
