how to add new line on php with /r /n

in this code :

 message = "{{ lang["ticket.order1"] }} " + document.getElementById("orderid").value + 'rnrn' + "{{ lang["ticket.order2"] }} " + document.getElementById("istek").value + 'rnrn' + " {{ lang["ticket.message1"] }} " + document.getElementById("mesaj").value;

All words in one line ! what is worng ?

 message = "{{ lang["ticket.order1"] }} " + document.getElementById("orderid").value + 'rn' + "{{ lang["ticket.order2"] }} " + document.getElementById("istek").value + 'rn' + " {{ lang["ticket.message1"] }} " + document.getElementById("mesaj").value;

not work 🙁

 message = "{{ lang["ticket.order1"] }} " + document.getElementById("orderid").value + '<br>' + "{{ lang["ticket.order2"] }} " + document.getElementById("istek").value + '<br>' + " {{ lang["ticket.message1"] }} " + document.getElementById("mesaj").value;

not work 🙁

What is wrong ?