Invalid form Submission in WordPress wp_handle_upload

Invalid form Submission in WordPress wp_handle_upload. Sometime, we face the issue of `Invalid form Submission` . I have a solution for the problem. It actually occurs when you pass single argument to the `wp_handle_upload`.  your code might be like the below one.

$file = wp_handle_upload($_FILES['upload_file']);

You have to add one more parameter with it.

$file = wp_handle_upload($_FILES['upload_file'],  array('test_form' => FALSE));

This one solves your problem .