html - Notice: Undefined index: userid in C:xampphtdocsfashionincludeheader.php on line 130

Notice: Undefined index: userid in C:\xampp\htdocs\fashion\include\header.php on line 130

Notice: Undefined index: userid in C:\xampp\htdocs\fashion\include\header.php on line 140

I get the above errors and the corresponding coding lines are here

                 // line 130
                Welcome shopper, 
                login here
                
                Welcome ,
                logout 

                


                
                 My Order  // line 140

please help me with this :)