I have used ajax in the code which works perfectly and give me json or array which ever I want as an output. the code I have used is,

xmlhttp=new XMLHttpRequest();
xmlhttp.open("GET","http://map_ajax_control.php",false);
xmlhttp.send();

var test = xmlhttp.responseText;
alert(test);

This test variable gives me json/array.

I want to get the data which I received in the test variable in the JavaScript array.

The question is, how can I decode json data in javascript array? I have used the code as,

var output = new Array();
output = json_decode(xmlhttp.responseText);

but this code is not giving me any output.
How can I do this two things?

Try this:

var arr = xmlhttp.responseText.Split(',');

If it does not solve your problem then in your php code, use simple json_encode(your array); and on javascript, use myData= eval("(" + xmlHttp.responseText + ")"); .

I suggest you to follow this approach:

Encode the data you want to send by using a PHP binding for JSON at the server and decode the same using Javascript library for JSON. as:

var myObject = eval('(' + myJSONtext + ')');

or

var myObject = JSON.parse(myJSONtext, reviver);

Note: Include json2 javascript file to your solution..

Problem with storing values in Array from php to AJAX

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