Update docs

Closes exercism#409

concepts/for-loops/about.md

@@ -3,7 +3,7 @@
 `for` loops are the most complex type of loop in PHP. They behave like `for` loops in `C`, `Java`, and `JavaScript`. It's basic form is:
 
 ```php
-for (expr1, expr2, expr3) {
+for (expr1; expr2; expr3) {
   // statements
 }
 ```

concepts/for-loops/introduction.md

@@ -3,7 +3,7 @@
 `for` loops are the most complex type of loop in PHP. They behave like `for` loops in `C`, `Java`, and `JavaScript`. It's basic form is:
 
 ```php
-for (expr1, expr2, expr3) {
+for (expr1; expr2; expr3) {
   // statements
 }
 ```

docs/INSTALLATION.md

@@ -30,7 +30,7 @@ For further instructions, read the manual on [Installation on Unix systems](http
 
 ### macOS
 
-Normally macOS comes with PHP installed, but it is often an outdated version. There are other pre-built options available, including [MAMP](http://www.mamp.info/en/) and [php-osx.liip.ch](https://php-osx.liip.ch/).
+Normally macOS comes with PHP installed, but it is often an outdated version. There are other pre-built options available, including [MAMP](http://www.mamp.info/en/) and [php-osx.liip.ch](https://php-osx.liip.ch/). Installing PHP through [HomeBrew](https://brew.sh/) is also a good option.
 
 For further instructions, read the manual on [Installation on macOS](https://www.php.net/manual/en/install.macosx.php).
 
@@ -50,12 +50,14 @@ If you want to use a different OS, see instruction on [php.net/manual/en/install
 
 #### Via Composer
 
-PHPUnit version 8 can be installed globally via [Composer](https://getcomposer.org), using the following command.
+PHPUnit version 9 can be installed globally via [Composer](https://getcomposer.org), using the following command.
 
 ```bash
-> composer global require phpunit/phpunit ^8
+> composer global require phpunit/phpunit ^9
 ```
 
+It you are using PHP 8+ make sure you install at version 9.5 or later.
+
 #### Manual installation
 
-If you are not using Composer package manager, follow the official [Installing PHPUnit instructions](https://phpunit.readthedocs.io/en/8.5/installation.html).
+If you are not using Composer package manager, follow the official [Installing PHPUnit instructions](https://phpunit.readthedocs.io/en/9.5/installation.html).

docs/LEARNING.md

@@ -1,10 +1,9 @@
-# Recommended Learning Resources
-
-Exercism provides exercises and feedback but can be difficult to jump into for those learning PHP for the first time. These free resources can help you get started:
-
-[Laracasts - The PHP Practitioner Video Tutorials](https://laracasts.com/series/php-for-beginners)
-[PHP Documentation](http://php.net/docs.php)
-[PHP The Right Way](http://www.phptherightway.com/)
-[Codecademy's PHP Course](https://www.codecademy.com/learn/php)
-[StackOverflow](http://stackoverflow.com/questions/tagged/php)
-[PHP Pandas (Online Book)](https://daylerees.com/php-pandas/)
+# Recommended Learning Resources
+
+Exercism provides exercises and feedback but can be difficult to jump into for those learning PHP for the first time. These free resources can help you get started:
+
+* [Laracasts - The PHP Practitioner Video Tutorials](https://laracasts.com/series/php-for-beginners)
+* [PHP Documentation](http://php.net/docs.php)
+* [PHP The Right Way](http://www.phptherightway.com/)
+* [Codecademy's PHP Course](https://www.codecademy.com/learn/php)
+* [StackOverflow](http://stackoverflow.com/questions/tagged/php)

docs/TESTS.md

@@ -9,5 +9,5 @@ Execute the tests with:
 For example, to run the tests for the Hello World exercise, you would run: 
 
 ```
-$ phpunit hello-world_test.php
+$ phpunit HellowWorldTest.php
 ```

exercises/shared/.docs/tests.md

@@ -17,7 +17,7 @@
 
    For example, to run the tests for the Hello World exercise, you would run:
 
-       ➜ ./phpunit hello-world_test.php
+       ➜ ./phpunit HelloWorldTest.php
 
 [PHPUnit]: http://phpunit.de