I am trying to upload files (image ) in a directory I named "uploads" but it's yielding error each time I am clicking submit button . My codes are :
    <!DOCTYPE html>
    <html>
    <head>
    <title></title>
    </head>
    <body>
    <?php 
        $up_image=array(
                        "upload_image"=>"/"
                       );
        if (isset($_FILES['upload_image']))$up_image['upload_image']=$_FILES['upload_image'];
        $target_dir = "uploads/";
        $target_file = $target_dir . basename($_FILES["upload_image"]["name"]);
        if (isset($_POST['submit'])) {
            if (move_uploaded_file($_FILES["upload_image"]["tmp_name"], $target_file)) {
              echo "success !";
            }else{
                echo "error !";
            }
        }
    ?>
   <form action="upload.php" method="POST">
      <input type="file" name="upload_image">
      <input type="submit" name="submit">
   </form>
</body>
</html> 
the error I am getting is given bellow :

 
    