如何在 Ajax 调用中正确捕获 PHP 错误

Question

I am retrieving javascript code from the server via the following ajax call

ajax (dojo):

dojo.xhrGet({
    url : 'script.php',
    handleAs : "javascript",
    load : function(response){
        /*Do Something*/
    },
    error : function(errorMessage) {
        console.error(errorMessage);
    }
});

script.php works fine, and, if the javascript code it returns is not valid code, the error handler will be invoked. However, the error message is incomplete, ie. it only shows the last function the error occurred in, not the entire chain of function calls. This is at times not very useful as I want to know where the error originated. Is there any way to output the entire trace?

Answer 1

Post the response of what you are returning.

I think you are better trying with a JSON response.

Answer 2

I was getting the same error object on xhrPost for a _saveCustom, even though my response status was 200 (the 'handle:' is the same for GET and POST).

Actually handle: as 'json' will threw the error as well, but handle as 'text' worked and triggered the call to the load callback function.

Answer 3

The reason I wasn't getting reliable error information is because I was using eval and I was expecting the same behavior I would observe having instead included those scripts. This question describes the differences and how eval runs the code whereas including those codes first inserts the code into the DOM then runs the code. The former is more efficient, but the latter is easier to debug.