将php数组值转换为javascript数组

Question

I need to return an array in php and use it in javascript. When I print the returned value it prints empty string. How do I make mistake?

$.ajax({
     type: "POST",
     url: "sort2.php",    
     success: function(result){      

     alert(result[0]);                                            

    }
});

//sort2.php

$data[0] = "book";
$data[1] = "pen";
$data[2] = "school";
echo json_encode($data);

Answer 1

You have to parse the JSON data

$.ajax({
     type: "POST",
     url: "sort2.php",    
     success: function(result){      

     //Parse Json to Array 
     result = jQuery.parseJSON(result);
     alert(result) // would output the result array                                      

    }
});