get meta data of mp3 with getID3 PHP

Question

I'm trying to get the meta data out from my mp3 playlist using PHP and the library getid3, I'm sure the file path is correct and the mp3 has some information on meta data, but the information returns me null. Here is my code :

<?php
header("Content-type: application/json");

require_once('getid3/getid3.php');

$input = json_decode(file_get_contents("php://input"), true);
$action = $input['action'];

switch ($action) 
{   
    case "get_songs":

    $currentDirectory = dirname(dirname(getcwd()));
    $directory = $currentDirectory."/resources/assets/playlists/";

    $files = glob($directory."*.mp3");

    for($i = 0; $i < count($files); $i++)
    {
        $getID3 = new getID3;
        $file = ($files[$i]);
        $ThisFileInfo = $getID3->analyze($file);
        $Result = array('song_url'=>($files[$i]), "tags"=> $ThisFileInfo);
        $data[] = $Result;
    }

    $result = array("result"=>"ok","data"=>$data);  

    break;
}

echo json_encode($result);
?>

I know the library is working, because when I force it to access a local file it returns me :

"GETID3_VERSION" = "1.7.4";
                error =                 (
                    "Could not open file \"AYO.mp3\""
                );

Could it be, I cant access files from another path?