Fix highlighter consistency

- in some places php would not be highlighted as the `<?php` tag was missing
- in one place there was a duplicate `<?php` tage
- replaced `bash` with `console` for better highlighting
- ensured all console snippets are wrapped within highlighting code
- wrapped ini examples in highlighting code

_posts/01-03-01-Built-in-Web-Server.md

@@ -8,7 +8,9 @@ anchor: builtin_web_server
 
 With PHP 5.4 or newer, you can start learning PHP without installing and configuring a full-fledged web server. To start the server, run the following command from your terminal in your project's web root:
 
-    > php -S localhost:8000
+{% highlight console %}
+> php -S localhost:8000
+{% endhighlight %}
 
 * [Learn about the built-in, command line web server][cli-server]