$global_assign

This is a list of variables that are always implicitly assigned to the template engine. This is handy for making global variables or server variables available to all templates without having to manually assign them. Each element in the $global_assign should be either a name of the global variable, or a key/value pair, where the key is the name of the global array and the value is the array of variables to be assigned from that global array. $SCRIPT_NAME is globally assigned by default from $HTTP_SERVER_VARS.