Using same session ID within two PHP scripts at same time

Question

I have ocassionally detected a strange problem with PHP sessions.
When I am running two PHP scripts using SAME session ID, second script is stuck until first one is comp

Answer 1

I also found quite simple solution for this problem. We can use session_write_close(); to unlock session file in script 1, then we can make any file_get_contents(), curl_exec() etc without any worries and after these operations turn session back by session_start(). Checked by myself, works as charm!