All sites down seemingly after PHP update a week ago

For about a week now I have been unable to view any of 11 self-hosted sites on Ubuntu 22.04, apparently after a PHP 8.1.x update. I have enabled WordPress error logging and nothing is written to that file.

The server’s Apache2 error log contains the same message (barring the path for the relevant site) when I try to access the homepage of each site: PHP Fatal error: Array and string offset access syntax with curly braces is no longer supported in /var/www/html/EXAMPLE.com/public_html/index.php on line 2

I checked the PHP version:

$ php –version
PHP 8.1.2-1ubuntu2.14 (cli) (built: Aug 18 2023 11:41:11) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.2, Copyright (c) Zend Technologies
   with Zend OPcache v8.1.2-1ubuntu2.14, Copyright (c), by Zend Technologies

Setting a version has no effect:

There are 2 choices for the alternative php (providing /usr/bin/php).

 Selection    Path                  Priority   Status
————————————————————
 0            /usr/bin/php.default   100       auto mode
 1            /usr/bin/php.default   100       manual mode
* 2            /usr/bin/php8.1        81        manual mode

I can access phpMyAdmin so the only virtual hosts I can’t access are the WP sites.

I am completely at sea. One of the inaccessible sites is https://www.leecorpweb.com

• This topic was modified 1 year, 2 months ago by starapple.

The page I need help with: [log in to see the link]