How to send a file attached to a form via phpmailer?

Question

PHP

The whole question is in the title.
How to attach a file to a message using phpmailer?
All data entered by the client is sent $text = $_POST['message'];
How to add a file to $text?
Data is collected from the form (I don’t know how to collect file):

function order_form(){
  var message = '';
  var client_name = $("#client_name_order").val();
  var client_phone = $("#client_phone_order").val();
  var client_email = $("#client_email_order").val();
  var client_text = $("#client_text_order").val();
  if (client_phone == ''){
    //alert('Пожалуйста, напишите свой номер телефона.');
    swal({ title: "",   text: "Не заполнено поле 'Ваш телефон'",   type: "error",   confirmButtonText: "ОK", confirmButtonColor: "#CD0117" });
    return;
  }else if(client_email == ''){
    swal({ title: "",   text: "Не заполнено поле 'Ваш e-mail'",   type: "error",   confirmButtonText: "ОK", confirmButtonColor: "#CD0117" });
    return;
  }else{
    message = 'Телефон: ' + client_phone + '<br /> Имя: ' + client_name + '<br /> Почта: ' + client_email + '<br /> Сообщение: ' + client_text;
    $.ajax({
      url: '/mailer/send_letter.php',
      type: 'post',
      data: 'mode=call_back&message=' + message,
      dataType: 'text',
      success: function(data) {
        if (data = '0'){
          swal({ title: "",   text: "Ваша заявка успешно отправлена!",   type: "success",   confirmButtonText: "ОK", confirmButtonColor: "#CD0117" });
          setTimeout(function(){ location.reload(); }, 3000);
          return;
        }else{
        swal({ title: "",   text: "Ошибка отправки сообщения",   type: "error",   confirmButtonText: "ОK", confirmButtonColor: "#CD0117" });
        return;
        }
      }
    });
  }
}

Answer 1

stackoverflow.com/questions/11764156/send-file-att...