Question

here I have jQuery ajax calling a .php file that SOMETIMES executes let’s say the following

echo "hello"

Here it is:

    $.ajax({
        type: "POST",
        url: myurl.php
        data: data_string,
        timeout: 6000,
        success: function () {

        }
    });

I would like to know: is it possible to make the ajax return ERROR and not SUCCESS when something like the previous echo is executed in the PHP file? I mean, checking inside this $.ajax if the php file is executed as I would or not.

EXPLAINING BETTER:
I get error when the request could not be completed and success when it could. But I would like to get like a return value from this PHP file. If it returns 1, I wanna do something. If it returns 2, instead, I wanna do something else. Hope I explained it better..

Thanks in advance.

Answer 1

I recommend using json_encode() within your PHP file. For example:

echo json_encode(array('success' => 'do_foo'));
exit();

Then you can add a conditional within the success callback:

$.ajax({
  type: "POST",
  url: myurl.php
  data: data_string,
  dataType: "JSON", //tell jQuery to expect JSON encoded response
  timeout: 6000,
  success: function (response) {
    if (response.success === 'hello'){
      console.log(response);
    } else {
      console.log('else');
    }
  }
});