Создать и отправить текстовый документ в виде вложения по форме php?

Question

У меня есть форма PHP (Wilio - Survey и Multipurpose Form Wizard), отправляющая электронные письма отправителю и администратору, она не связана с базой данных, моя цель - как только пользователь отправит свои данные, форма отправит их непосредственно по почте в видевложение слова без каких-либо дополнительных шагов.

вот код HTML

<form id="wrapped" method="POST">
                        <input id="website" name="website" type="text" value="">
                        <div id="middle-wizard">
                            <div class="step">
                                <h3 class="main_question"><strong>1/2</strong>Please fill the below</h3>
                                <div class="form-group">
                                    <input type="text" name="student_name" class="form-control required" placeholder="Student Name" onchange="getVals(this, 'student_name');">
                                </div>
                                <div class="form-group">
                                    <input type="text" name="school_name" class="form-control required" placeholder="School Name" onchange="getVals(this, 'school_name');">
                                </div>
                                <div class="form-group">
                                    <input type="text" name="teacher_name" class="form-control required" placeholder="Teacher Name" onchange="getVals(this, 'teacher_name');">
                                </div>
                                <div class="form-group">
                                    <input type="text" name="class_name" class="form-control required" placeholder="Class" onchange="getVals(this, 'class_name');">
                                </div>
                                <div class="form-group">
                                    <input type="email" name="email" class="form-control required" placeholder="Your Email" onchange="getVals(this, 'email');">
                                </div>
                                <div class="form-group">
                                    <input type="number" name="mobile_number" class="form-control required" placeholder="Mobile Number" onchange="getVals(this, 'mobile_number');">
                                </div>
                            </div>
                            <div class="submit step">
                                <h3 class="main_question"><strong>2/2</strong>Summary</h3>
                                <div class="summary">
                                    <ul>
                                        <li><strong>1</strong>
                                            <h5>Personal Details</h5>
                                            <ul>
                                                <li><label>Student Name</label>: <span id="student_name"></span></li>
                                                <li><label>Mobile Number</label>: <span id="mobile_number"></span></li>
                                                <li><label>Email</label>: <span id="email"></span></li>
                                            </ul>
                                        </li>
                                        <li><strong>2</strong>
                                            <h5>Educational Details</h5>
                                            <ul>
                                                <li><label>School Name</label>: <span id="school_name"></span></li>
                                                <li><label>Teacher Name</label>: <span id="teacher_name"></span></li>
                                                <li><label>Class</label>: <span id="class_name"></span></li>
                                            </ul>
                                        </li>
                                    </ul>
                                </div>
                            </div>


                        </div>

                        <div id="bottom-wizard">
                            <button type="button" name="backward" class="backward">Prev</button>
                            <button type="button" name="forward" class="forward">Next</button>
                            <button type="submit" name="process" class="submit">Submit</button>
                        </div>
                    </form>

и вот код PHP

<?php
                    $mail = $_POST['email'];
                    $to = "my-email@my-domain.com";
                    $subject = "Appreciation Certificate";
                    $headers .= 'MIME-Version: 1.0' . "\r\n";
                    $headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
                    $headers .= "From: Education Council <noreply@my-domain.com>";
                    $message .= '<div style="text-align: center;"><img src="http://www.my-domain.com/testmail/html/img/banner.jpg" alt="Education Council Banner" /></div>';
                    $message .= "<h1 style='text-align: center;'>Appreciation Certificate</h1>";
                    $message .= "\n\n<h2 style='text-align: center;'>World Teachers Day</h2>";
                    $message .= "\n\n<h1 style='text-align: center;'>It's good to appreciate others for their excellence, efforts and giving</h1>";
                    $message .= "\n\n<h1 style='text-align: center;'>Student: </h1>" . $_POST['student_name'];
                    $message .= "\n\n<h1 style='text-align: center;'>School: </h1>" . $_POST['school_name'];
                    $message .= "\n\n<h1 style='text-align: center;'>My thanks and gratitude to my teacher</h1>";
                    $message .= $_POST['teacher_name'];
                    $message .= "\n\n<h1 style='text-align: center;'>On the occasion of World Teachers Day 2019</h1>";
                    $message .= "\n\n<h2 style='text-align: center;'>Hoping for them permanence excellence and giving</h2>";
                    $message .= "\n\n<h2 style='text-align: center;'>The Education Council</h2>";

                    //Receive Variable
                    $sentOk = mail($to,$subject,$message,$headers);

                    //Confirmation page
                    $user = "$mail";
                    $usersubject = "Appreciation Certificate";
                    $userheaders .= 'MIME-Version: 1.0' . "\r\n";
                    $userheaders .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
                    $userheaders .= "From: Education Council <noreply@my-domain.com>\n";
                    $usermessage = "$message"; 
                    mail($user,$usersubject,$usermessage,$userheaders,$headers);
  ?>

надеюсь найти помощь.