php - The second argument to copy() function cannot be a directory and move_uploaded_file(): Unable to move

in the
code

if(isset($_POST['submit'])){



            $post_image=$_FILES['post_image']['name'];

            $post_image_tmp=$_FILES['post_image']['tmp_name'];


            if($post_image='' ){

 echo "";
 exit();


            }
else{

move_uploaded_file($post_image_tmp,"news_images/$post_image");
?>

I
get this error

Warning: move_uploaded_file(): The second argument to copy()
function
cannot be a directory in
C:\xampp\htdocs\MyCMS\admin\insert_post.php
on line 107

Warning: move_uploaded_file(): Unable to move

'C:\xampp\tmp\php946C.tmp' to 'news_images/' in

C:\xampp\htdocs\MyCMS\admin\insert_post.php on line
107

Please
help I'am just newbie.

itemprop="text">

class="normal">Answer

= is
assignment operator.
use comparison operator ==
here.

if($post_image == '' )
            {