json array parsing in javascript

Question

I have a json array printed out from php file. And then tried to get elements by parsing it. But I am confused where is wrong.

    <?php

    $json = array("a1", "a2", "a3", "a4", "a5".......);
    echo json_encode($json);

    ?>

    <script>
    $.ajax({
    /*other codes*/

    success : function(data){

            var json = parseJSON(data);
            for(var i = 0 ; i < json.length; i++){
               alert(json[i]);
            }

            }   

Answer 1

Use

$.ajax({
        dataType: "json",
        ...

The response (data) is in JSON.

Answer 2

If data is a JSON String then you can use JSON.parse() method to convert it into JSON Object and then we can parse it using Array map() method or for...in loop.

var json = JSON.parse(data);
var result = json.map(function(item) {
    return item;
});