I am on “http://localhost/jmsp-local/admin/receipt/add.php” but still “Book Receipts” and “Blogs/Articles” categories are opened and the sub-category of it is also Active

I am building a live chat for an IT class project using html,css,php and JS. My problem is that i don’
t know how to make this chat live-time. I have built the chat window, uploaded all the chat users but when i click to send a message on the chat window it redirects me to the ‘send_message.php’ page. The message upload successfull on my database, but i can’t display it on the chat window. I will provide bellow the chat-page scripts, and php files,both for upload and send_messages. Any help would be appreciated!