php - Test if session is started -

How do you check whether sessions are started or not? This is not the way ...

  session_start (); If (isset ($ _ session)) {echo "sessions"> 
 } And {echo "session closed 
"; } Session_destroy (); If (isset ($ _ session)) {echo "sessions"> 
 } And {echo "session closed 
"; }  

Try it out:

if (session_id ())