process.php

<?php

require('../../../wp-blog-header.php');
get_header();

    if ( isset( $_POST['afs-submitted'] ) ) {

        global $wpdb;

        $row = $wpdb->get_row("SELECT * FROM wp_asf_layout");

        $userName    = sanitize_text_field( $_POST["asf-name"] );
        $userEmail   = sanitize_email( $_POST["asf-email"] );

        $subject = $row->subject;
        $message = $row->message;
        $attachments = array( $row->files );
        $admin_email = $row->email_from;
        $headers = "From: $row->name_from <$admin_email>" . "\r\n";

        $new_url = add_query_arg( 'success', 1, get_permalink() );
        wp_redirect( $new_url, 303 );

        if ( wp_mail( $userEmail, $subject, $message, $headers, $attachments) ) {
            echo '<div>';
            echo '<p>Thanks for contacting</p>';
            echo '</div>';
        } else {
            echo 'An unexpected error occurred';
        }
    }