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);}
    });

Answer 2

Basically you can't pass ile with value 1, 3 or 5 literally.

Change your code like below:

var ile = 1;// just a example so I assign 1 to variable `ile`
var postData = {'ile': ile};
$.ajax({
    url: "operations.php",
    type: "post",
    data: postData,
    success: function(response){
       alert(response);
    }
});

JQuery documentation says data is

Data to be sent to the server. It is converted to a query string.

Type: PlainObject or String or Array

So that's why you can't send 1, 3 or 5 directly, its supposed to be a object like {name1: value, name2: value2} or a query string like 'name1=value1&name2=value2'

EDIT

See your php code, in if condition please use logic OR || like the other guy said in the comment.