Upload script

<?php
/**
 * Handles the image uploads
 * Author: Ayan Dey
 */

require "dbClass.php";
$db = new DB();

date_default_timezone_set('America/Los_Angeles');
$timeStamp = time();

// Upload path
$path = "../uploads/";

if($_SERVER["REQUEST_METHOD"] === "POST") {
    $error = "";
    $message = "";
    $name = FILTER_VAR($_POST["heading"], FILTER_SANITIZE_STRING);

    if(empty($name)) {
        $error = "Please type your name..";
    }
    else {
        if($_FILES["fileUpload"]["error"] === 0) {
            $filename = $_FILES["fileUpload"]["name"];
            $fileExt = strtolower(pathinfo($filename, PATHINFO_EXTENSION));

            if($fileExt === "jpg") {
                $tmpFile = $_FILES["fileUpload"]["tmp_name"];
                $newFile = $name . "_" . $timeStamp . "." . $fileExt;

                if(move_uploaded_file($tmpFile, $path . $newFile)) {
                    $db->query("INSERT INTO files(name, filename) VALUES(:name, :filename)", array("name"=> $name, "filename"=> $newFile));
                    $message = "File Upload Successful";
                }
                else {
                    $error = "Failed to upload the snap..";
                }
            }
            else {
                $error = "Wrong file type!";
            }
        }
        elseif ($_FILES["fileUpload"]["error"] === 4) {
            $error = "No file selected..";
        }
        else {
            $error = "Some error occured while uploading the file. Error Code: ".$_FILES["fileUpload"]["error"];
        }
    }

    if(empty($error)) {
        echo json_encode(array("MSG" => $message, "CLASS" => "success", "code" => 0));
    }
    else {
        echo json_encode(array("MSG" => $error, "CLASS" => "error", "code" => 1));
    }
}