Ajax PHP中的结果空白

Question

Every time I do an Ajax request, I want server to check if number is 1, 3 or 5, and depending on result, echo out answer. The problem is, I get no data in my alert();. Here's my code:

ajax:

ajaxNumber= $.ajax({
            url: "operations.php",
            type: "post",
            data: ile,
            success: function(data){alert(data);}
        });

PHP:

if(isset($_POST['ile'])) {
  $numer = intval($_POST['ile']);
  if($numer==1|$numer==3|$numer==5) {
  echo "ok";
 } else {
  echo "ERROR";
 }
}

alert(); is being displayed, but it's just empty.

EDIT: Running operations.php on my own and giving $_POST['ile'] an existing value echos out me good responses.

Answer 1

you don't set ile name so $_POST['ile'] is empty, try this :

ajaxNumber= $.ajax({
        url: "operations.php",
        type: "post",
        data: {'ile':ile},
        success: function(data){alert(data);}
    });