PHP website background boss framework cannot exit after the session expires

After the PHP website background framework session expires, you cannot exit the PHP website background using the framework. the pattern is: Top, left, right, and bottom. There is an exit link on the top and left. the exit code is as follows: & lt; ahref = & quot; quit. php? Tag = exit & quot; target = & quot; mainFrame & quot; rel = & quot; mai PHP website background framework session cannot be all exited after expiration
The PHP website uses a framework in the background. the layout is: Top, left, right, and bottom.
There is an exit link on the top and left. the exit code is as follows:
Exit safely
Session_start ();
If ($ _ SESSION ['tr _ adm_no '] = ""){
Echo"