php - How to receive error in jQuery AJAX response? -


i using jquery $.ajax() function perform database insert operation on php page. so, on success regular operation want ajax call receive error if update operation fails.

so should be:

  1. $.ajax -> call php function
  2. receive success on successful record insert
  3. receive error on unsuccessfull insert

so, should return false; php function? think $.ajax() success or error depends if ajax call successful or not. so, think if return false; php function still considered "success" ajax call. right

you return error message in server response (or using json) suggested. don't because pollutes data returned.

i way i've been using recently, involves creating custom http header inform if there error.

php code:

if($there_was_error){    header("db_success: 0"); //sends custom header }else{    header("db_success: 1"); }

jquery code:

$.ajax({   ...   success: function(data, status, xhr){      //you can use 'data' var      if(xhr.getresponseheader("db_success") == 1){         alert("save successful");         //your regular sutff      }else{         alert("save failed");      }            }   ... })

as can see, created custom http header, called db_success used metadata, can assign server-side (php) , read client-side (javascript) know if there error.

hope helps. cheers


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