解析json文本只从javascript / ajax中的php响应返回

Question

I am creating a website in which , I am inserting data into database using ajax XMLHttpRequest().

From php file I am sending response like this.

$response = array();
$response["success"] = 1;
echo json_encode($response);

In javascript file I am getting response as.

var json = xmlhttp.responseText;

Now while executing, var json contains response with some additional texts

{"success":1}< !--first comments --> < script> an script from server < /script>< !--second comments -->

I want to parse only json text {"success":1} using javascript, plz don't suggest jquery approach.

I tried var obj = JSON.parse(json);, but it did not work.

Answer 1

Change your ajax code to this

$response = array();
$response["success"] = 1;
echo json_encode($response);
exit;