Downgrade WordPress
Sometime we meet the trouble "Parse Error" due to update of WordPress and need to downgrade the WordPress version. Here is the process how to downgrade the WordPress
Delete directories and files
Login to the site and delete all files except:
wp-content (folder)
.htaccess (file)
wp-config.php (file)
https://gyazo.com/68f4b5aa1d1f13477304ee93ba3249c7
Upload fresh WordPress files
Unarchive the WordPress and delete wp-content folder and wp-config.php not to overwrite files.
Upload fresh WordPress files on the server.
That's it.