Revert "Created "The Basics" section"

This reverts commit 4b564bdf86.

_posts/05-03-01-The-Basics.md

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----
-isChild: true
----
-
-## The Basics
-
-In this paragraph you will get familiar with a few of the most common beginner mistakes.
-
-
-### Using correct number of =
-
-The most common mistake is not to distinguish three different ``=`` operators:
-
-
-1. ``=`` which means assignment,
-2. ``==`` which means comparison **without** type checking (equality),
-3. ``===`` which means comparison **with** type checking (identicality)
-
-Comparison operators are used always when you want to make sure that two variables or values are equal, for example:
-
-{% highlight php %}
-if ($user->isAuthorized() === true) {
-{% endhighlight %}
-But you can also use assignment operators within condition blocks:
-
-{% highlight php %}
-if ( ($myObject = Cache::read('my-cache-key')) === false ) {
-{% endhighlight %}
-Notice: first, the assignment is made, which is exactly what we want, and then it is evaluated against ``boolean false``.
-
-Not understanding comparison operators may result in logic errors. One of the most common happens when using ``strpos``.
-
-{% highlight php %}
-$str = strpos('http://phptherightway.com', 'http://');
-{% endhighlight %}
-
-Notice: ``$str`` will become ``integer`` 0 as ``'http://'`` is found right at the beginning.
-Keep in mind that when no occurences is found, ``strpos`` will return ``boolean false``.
-
-So following code will cast ``integer`` 0, to ``boolean`` false:
-
-{% highlight php %}
-if ($str) { 
-{% endhighlight %}
-
-Which is clearly a logic error, because the ``http://`` substring was found.
-
-That's where `comparison operator with type checking` comes in:
-
-{% highlight php %}
-if ($str !== false) {
-{% endhighlight %}
-
-No type casting will occur, and that's why your logic is fine.
-
-### Unneded if/else and ternary
-
-Beginners very often tend to write following code:
-
-{% highlight php %}
-if($user->isAuthorized()) { 
-	return true; 
-} else { 
-	return false;
-}
-{% endhighlight %}
-
-Notice that isAuthorized() is actually a ``boolean``, so you can write:
-
-{% highlight php %}
-return $user->isAuthorized();
-{% endhighlight %}
-
-Another very common example would be:
-
-{% highlight php %}
-if ($user->isAuthorized()) { 
-	echo 'User authorized'; 
-} else { 
-	echo 'Authorization error.'; 
-}
-{% endhighlight %}
-
-Here you can simply use ternary operator:
-
-{% highlight php %}
-echo $user->isAuthorized() ? 'User authorized' : 'Authorization error.';
-{% endhighlight %}
-
-As you can see above, ternary operator is just a more compact form of an ``if`` block.
-
-Keep in mind, that when you need to use nested ``if`` blocks, it is not recommended to use ternary operator, 
-as it may result in unreadable and error prone code:
-
-{% highlight php %}
-echo (true?'true':false?'t':'f');
-{% endhighlight %}
-
-### Short tags
-
-Since PHP 5.4 , short tags are always safe to use. Regardless :
-
-``short_open_tag = Off``
-
-Short tags are especially convenient to use in your presentation layer and that's where you should incorporate them.
- 
-_When using PHP < 5.4, be aware that if short tags are supported or not, depends on your php.ini settings._ 
-  
-So, enjoy writing:
-
-{% highlight php %}
-<?= 'Hello ', $user->getLogin() ?>
-{% endhighlight %}
-
-Instead of:
-
-{% highlight php %}
-<?php echo 'Hello ', $user->getLogin() ?>``
-{% endhighlight %}