problem in getting data from php file using jquery

See more:

PHP

MySQL

jQuery

JSON

Hello guys,
I am getting a problem in getting JSON data from a php file (PHP file is using database i.e MySQL).
Code is mentioned below.

jQuery

$.getJSON("fetch.php",function(data){
    $("ul").empty();
    $.each(data.result,function()
{
   $("ul").append("<li>Name : "+this['name']+"</li><br/> ");
   $("ul").append("<li>Age : "+this['age']+"</li><br/> ");
   $("ul").append("<li>Company : "+this['company']+"</li><br/> ");
});
});

PHP

<?php
include_once ('db.php');

$sql="Select * from people";
$res=  mysql_query($sql);
$result=array();

while($row=  mysql_fetch_array($res))
{
    array_push($result, array('name' => $row[0],
                              'age'=>$row[1],
                               'company'=>$row[2]));
    echo json_encode(array("result"=>$result));
}
?>

Update : Problem is that jquery doesn't gives any output on the browser. Yes, I am posting every row of the query output so I inserted "echo" in while loop.