Help! Parse Error After Update

Hello - I am trying to find help anywhere I can. My website is down and I cannot figure out why. I did an automatic update (twice) and am getting this error:
Parse error: syntax error, unexpected 'global' (T_GLOBAL) in /var/www/vhosts/cjmsolutions.ca/httpdocs/wp-includes/comment-template.php on line 435
I am not sure what to do.
Sharon