I need to get an array generated from a script php. I have Latitude and Longitude for each user in a database.
I take the values from the db with this code (file.php):

$query = SELECT Latitude, Longitude FROM USERS;

$result=mysql_query($query);

$array=array();

while ($data = mysql_fetch_array($result)) {

    $array[]=$data['Latitude'];

    $array[]=$data['Longitude'];

}



echo $array;

and I call with ajax with this code:

$.post('./file.php',

     function( result ){    

         alert(result);

     });

but even if in the script php the array is correct (if I echo array[25] I obtain the right value) in Javascript I obtain Undefined.
How can I get the array in correct way??
thanks!

edit: after encoded with json_encode($array); in php and JSON.parse(result) in javascript seems not working.
In the console I have the array, but I can't access to its values. (Array[0] gave me undefined).