( ! ) Warning: Undefined variable $HTTP_SESSION_VARS in R:\Ampps\www\Ejemplos Anaya\chapter20\page3.php on line 6
Call Stack
#	Time	Memory	Function	Location
1	0.0006	403184	{main}( )	...\page3.php:0

( ! ) Warning: Trying to access array offset on value of type null in R:\Ampps\www\Ejemplos Anaya\chapter20\page3.php on line 6
Call Stack
#	Time	Memory	Function	Location
1	0.0006	403184	{main}( )	...\page3.php:0

The content of $HTTP_SESSION_VARS['sess_var'] is