Long running background PHP script blocks other PHP pages until it is finished

Question

I made a long script in PHP as such:

ignore_user_abort(true);
set_time_limit(0);

It runs perfectly in the background even if I close the pa

Answer 1

As mentioned in comments, Sessions are the problem - this is because the session file is locked.

Use session_write_close() in your long-running script to unlock the session file, but note that you cannot use $_SESSION variables in that particular script afterwards.