Created Arrays (markdown)

Arrays.md

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+# Always use the long array syntax
+
+Arrays should be initialized using the long array syntax.
+
+<details><summary>Example</summary><div><br>
+
+**Bad**
+
+```PHP
+$data = [ 'hello' => 'world' ];
+```
+
+**Good**
+
+```PHP
+$data = array('hello' => 'world');
+```
+
+</div></details><br>
+
+_Reference_: [`Generic.Arrays.DisallowShortArraySyntax`](https://github.com/squizlabs/PHP_CodeSniffer/blob/master/src/Standards/Generic/Sniffs/Arrays/DisallowShortArraySyntaxSniff.php)