5.6 Zero tests ~14 year old codebase in some parts, most of it is rawdog php and includes. No class structure beyond what we've added for new features. Client actively beligerant at this point to our original agreed goal of them getting 7.x running alongside it on their hardware, and moving portions of the app over as they are worked on, so there's no feature freeze for 12-18 months as it's migrated. They've brought in a second outsourced team as we "aren't moving fast enough" / actually giving a damn to fix security flaws when we find them. This outsourced team is going as well as you'd expect from hearing the term "outsourced team"... Hoping they either get their head out of their ass, or we can cut them off as a client at somepoint. It's just not worth it. More on reddit.com

PHP versions below 8.1 are no longer being supported ( https://php.watch/versions ) i.e. if a bug or vulnerability is discovered in 7.4 or 8, it ain't getting fixed. There's not really any reason to NOT upgrade. Recent versions offer performance improvements. You should always be running up to date WP, theme and plugins anyway - if you're running a plugin or theme that requires php 7.4, it's just a matter of time until you're hacked, because the theme/plugin isn't getting patched. More on reddit.com

The URL given is one that works with the script they provide or expect you to write. There's no built-in "magic URL" to show that information with PHP. A HTML page of configuration information can be generated in PHP code using phpinfo() You may also want to pay attention to the top section of phpinfo() output that lists the ini files read, to make sure you're editing the right files. This same information is available on the command line through the following commands: php -i (full information similar to phpinfo()) php -m (enabled modules / extensions) php -v (version) php --ini (ini files read) See also php --help for more command-line options. Note that you can also set most ini settings at runtime in a script using ini_set() . In this specific case see also the error_reporting() function. More on reddit.com

If I am the one providing the hosting or the clients pay for maintenance on a monthly basis, I charge nothing because it takes less than 1 min to do this. Charging them 1h for 1min of work it is absolutely gross. If there are any errors after changing the php version, then I change it back and let them know their website needs some work. More on reddit.com