enrol.html

<h3><?php print_string("paymentrequired") ?></h3>
<p><b><?php echo get_string('cost', 'enrol_sslcommerz').": {$instance->currency} {$localisedcost}"; ?></b></p>

<p><?php print_string("paymentinstant") ?></p>
<div class="container">
    <div class="row">
        <div class="col-md-8 order-md-1">
            <form action="sslcommerz/SSLCommerz/checkout_hosted.php" method="POST" class="needs-validation">
                 <input type="hidden" name="customer_name" class="form-control" id="customer_name" placeholder=""
                               value="<?php echo $USER->firstname . ' ' . $USER->lastname; ?>">
                 <input type="hidden" name="customer_mobile" class="form-control" id="mobile" placeholder="Mobile"
                               value="<?php echo $USER->phone1; ?>">

                 <input type="hidden" name="customer_email" class="form-control" id="email"
                           value="<?php echo $USER->email; ?>">

                 <input type="hidden" class="form-control" id="address" name="customer_address"
                           value="<?php echo $USER->address; ?>">
                 <input type="hidden" name="customer_country" value="<?php echo $USER->country; ?>">
                 <input type="hidden" name="state" value="<?php echo $USER->state ?? ""; ?>">

                <input type="hidden" value="<?=p($cost) ?>" name="amount" id="total_amount" required/>
                <input type="hidden" value="<?php echo $course->fullname; ?>" name="coursename" id="coursename" required/>
<!--                <input type="hidden" value="<?php echo $category->id; ?>" name="categoryid" id="categoryid" required/>-->
                <input type="hidden" value="<?php echo $USER->id; ?>" name="userid" id="userid" required/>

                <input type="hidden" name="cmd" value="_xclick" />
                <input type="hidden" name="charset" value="utf-8" />
                <input type="hidden" name="business" value="<?php p($this->get_config('sslcommerzbusiness'))?>" />
                <input type="hidden" name="store_id" value="<?php p($this->get_config('sslstoreid'))?>" />
                <input type="hidden" name="item_name" value="<?php p($coursefullname) ?>" />
                <input type="hidden" name="item_number" value="<?php p($courseshortname) ?>" />
                <input type="hidden" name="quantity" value="1" />
                <input type="hidden" name="on0" value="<?php print_string("user") ?>" />
                <input type="hidden" name="os0" value="<?php p($userfullname) ?>" />
                <input type="hidden" name="course_id" value="<?php echo $course->id; ?>" />

                <input type="hidden" name="instance_id" value="<?php echo $instance->id; ?>" />
                <input type="hidden" name="custom" value="<?php echo "{$USER->id}-{$course->id}-{$instance->id}" ?>" />
                <input type="hidden" name="currency_code" value="<?php p($instance->currency) ?>" />

                    <input type="hidden" name="for_auction" value="false" />
                <input type="hidden" name="no_note" value="1" />
                <input type="hidden" name="no_shipping" value="1" />
                <input type="hidden" name="rm" value="2" />
                <input type="hidden" name="cbt" value="<?php print_string("continuetocourse") ?>" />


                <button class="paynowbutton" type="submit"><?php echo get_string('button_name', 'enrol_sslcommerz')?></button>
            </form>
        </div>
        </div>
    </div>

<style>
    <?php
    include 'style_enrol_sslcommerz.css';
    ?>
</style>

    <script>
        (function (window, document) {
            var loader = function () {
                var script = document.createElement("script"), tag = document.getElementsByTagName("script")[0];
                script.src = "https://sandbox.sslcommerz.com/embed.min.js?" + Math.random().toString(36).substring(7);
                tag.parentNode.insertBefore(script, tag);
            };

            window.addEventListener ? window.addEventListener("load", loader, false) : window.attachEvent("onload", loader);
        })(window, document);
    </script>
    <?php


echo html_writer::end_div();