[Documentation:Developer] Improve php unit test instructions (#686)

It turns out that no one knows how to run the full php unit test suite
and have it pass, so I investigated the php unit test instructions and
Improved them. @lavalleeale has some changes at
[https://github.com/Submitty/Submitty/pull/11802](url) to allow for the
full suite to pass so these docs should match that.

---------

Co-authored-by: Alex Lavallee <[email protected]>

Author: martig7

_docs/developer/testing/install_php.md

@@ -8,7 +8,7 @@ you will need to have PHP installed on your host machine first.
 
 ### Linux & WSL:
 
-*If you're distro cannot find the correct package or installs the wrong version you may have to specify php7.0 in each package name*
+*If you're distro cannot find the correct package or installs the wrong version you may have to specify php8.1 in each package name*
 
 ```bash
 sudo apt-get update
@@ -23,6 +23,10 @@ If you are missing extensions you can install them with `PECL` which will be
 installed automatically with PHP, but you should have everything required by 
 default.
 
+### Windows
+
+Download [php 8.1](https://windows.php.net/download/) as a zip file under the thread safe category. Then extract the contents of the zip to a folder, and add the path to that folder to your path system variable. It's suggested that one extracts the contents of the zip to a folder called `php`, which can be put at `C:\php` for simplicity. You can then add `C:\php` to your path system environment variable.
+
 ------------- 
 
 Verify you have PHP installed correctly, submitty requires a version greater than 7.0

_docs/developer/testing/linting_static_analysis.md

@@ -58,7 +58,7 @@ The following instructions were tested for Windows:
 
 1. First, you will need PHP installed on your host system first. See [Installing PHP](/developer/testing/install_php)*
 
-2. Next, you will need [Composer](https://getcomposer.org/doc/00-intro.md) installed on your host system as well.
+2. Next, you will need [Composer](https://getcomposer.org/download/) installed on your host system as well.
 	During this install, you will need to change settings in a php.ini file. Change the settings the prompt recommends.
 
 3. Run ``composer global require slevomat/coding-standard`` and ``composer global require "squizlabs/php_codesniffer=*"`` inside your terminal.

_docs/developer/testing/php_unit_tests.md

@@ -9,33 +9,37 @@ To validate the unit behavior of the site code, we utilize
 
 ### Running PHP Unit Tests
 
-*You will need PHP installed on your host system first, see [Installing PHP](/developer/testing/install_php)*
+*If you are running on WSL and are seeing errors, remove `php` from the following commands.*
 
-To run the PHP unit test suite locally, `cd` to the `Submitty/site` directory and type:
+To run the PHP unit test suite in VM use the alias
 
-If you are running on WSL and are seeing errors, remove "`php`" from the following commands.
+```
+submitty_test php-unit
+```
+
+or
 
 ```
-php vendor/bin/phpunit
+sudo -u submitty_php php vendor/bin/phpunit
 ```
 
 To run just an individual class or test, you can use the `--filter` flag on PHPUnit.
 For example, to run the function `testInvalidProperty` would be
-`php vendor/bin/phpunit --filter testInvalidProperty` and running all
+`sudo -u submitty_php php vendor/bin/phpunit --filter testInvalidProperty` and running all
 of `AccessControlTester` would be
 `php vendor/bin/phpunit--filter AccessControlTester`. Be aware, filter
 can match against partial strings, so if you have two tests `testFoo` and `testFooBar`,
 running `--filter testFoo` will run them both. Alternatively, you can also directly run
 `phpunit` against a specific class by passing the path to the test class directly to
 `phpunit`, for example
-`php vendor/bin/phpunit tests/app/authentication/DatabaseAuthenticationTester.php` will run
+`sudo -u submitty_php php vendor/bin/phpunit tests/app/authentication/DatabaseAuthenticationTester.php` will run
 only the test methods in `DatabaseAuthenticationTester.php`.
 
 The two concepts above can be combined to run a specific test function in a specific
 class by doing:
 
 ```bash
-vendor/bin/phpunit --filter testFunction tests/app/path/to/TestClass.php
+sudo -u submitty_php php vendor/bin/phpunit --filter testFunction tests/app/path/to/TestClass.php
 ```
 
 You can pass in the `--debug` flag when using PHPUnit to see PHP output, this can be

_docs/sysadmin/installation/version_notes/v20.08.00.md

@@ -16,7 +16,7 @@ requires the following edits:
 
 1. Locate your `php.ini` file.
 
-   _It is probably something like `/etc/php/7.2/fpm/php.ini`._
+   _It is probably something like `/etc/php/8.1/fpm/php.ini`._
 
    Note: You can run this command to print your specific version of php:
 
@@ -32,7 +32,7 @@ requires the following edits:
 3. Restart php fpm:
 
    ```
-   sudo systemctl restart php7.2-fpm
+   sudo systemctl restart php8.1-fpm
    ```
 
    Or more generally: