Question

i have this little code to post to my server

    $.ajax({
      type: 'POST',
      url: 'post.php',
      data: { token: '123456', title: 'some title', url: 'http://somedomain.com', data: '' },
      success: function(data){
        alert (data)
      }
    });        

Wondering how i can “catch” the different errors for ajax request:
for eg, post.php return ‘token error’ when invalid token has been posted, or ‘invalid title’ for missing title.

Thanks in advance

Answer 1

// build the initial response object with no error specified
$response = array(
  'error' => null
);

// the data checks went fine, process as normal
if (data is ok) {
  $response['some_object'] = value;

// something is bad with the token
} else if (bad token) {
  $response['error'] = 'token error';

// something is bad with the title
} else if (bad title) {
  $response['error'] = 'bad title';

// some other error occured
} else {
  $response['error'] = 'unspecified error';
}

// output, specifying that it's JSON data being returned
header('Content-Type: application/json');
echo json_encode($response);

and….

// $.ajax({ ...
success: function(data){
  if (!data.error){
    alert('OK!');
  }else{
    alert('Error: '+data.error);
  }
}
// });

Something like that perhaps? (Unless you’re talking legitimate AJAX errors, in which case supply the error: function(x,t,e){} ajax option or use .ajaxError)