How to pass variable values ​​from JS to PHP via AJAX in one file?

Question

PHP

There is a file 1.php in it there is a js code, there is a need to translate it into php.
I know that it can be done through ajax. I can pass values ​​from js file to php.

$.ajax({
                type: "POST",
                url: "gen.php",
                data: {"text" : new, "user_id" : user_id, "text" : text},
                success: function(data){
                    title = data;
                }
            });

But is it possible to do it in the same file? Without referring to gen.php?

Answer 1

Alexander Wolf wrote to you, everything works

<?php if(isset($_POST['messag'])) {
  exit($_POST['messag']);
}
?>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script type="text/javascript">
  var messag = 'answer';
  $.ajax({
    type: "POST",
    data: {
      "messag" : messag
    },
    success: function(data){
      console.log(data)
    }
  });
</script>

Answer 2

<?php
if(isset($_POST['user_id'])) {
  // обрабатываем
}
?>
<script>
$.ajax({
                type: "POST",
                url: ".",
                data: {"text" : new, "user_id" : user_id, "text" : text},
                success: function(data){
                    title = data;
                }
            });
</script>

Answer 3

So you can generate the js code itself from php

Answer 4

You can, if you write in the file something like

if ( $_SERVER["REQUEST_METHOD"] == "POST" ) {
  //код обработки формы
} else {
  //а здесь html и скрипт
}