Parse error: parse error, unexpected $ …. on line 46

When I visit my blog homepage, I receive the following message:

Parse error: parse error, unexpected $ in /home/content/j/a/n/jannaberge/html/wp-load.php on line 46

When I attempt to load the log-in page, I receive this message:

Parse error: parse error, unexpected $ in /home/content/j/a/n/jannaberge/html/wp-login.php on line 497

What has caused this problem? As far as I know, I’ve not altered anything since yesterday, when everything worked fine.