docs: add sub sections

Author: kenjis

user_guide_src/source/incoming/incomingrequest.rst

@@ -94,7 +94,8 @@ maintaining the ability to control the order you look for it:
 * ``$request->getPostGet()`` - checks ``$_POST`` first, then ``$_GET``
 * ``$request->getGetPost()`` - checks ``$_GET`` first, then ``$_POST``
 
-**Getting JSON data**
+Getting JSON Data
+=================
 
 You can grab the contents of ``php://input`` as a JSON stream with ``getJSON()``.
 
@@ -112,7 +113,8 @@ The second and third parameters match up to the ``depth`` and ``options`` argume
 If the incoming request has a ``CONTENT_TYPE`` header set to "application/json", you can also use ``getVar()`` to get
 the JSON stream. Using ``getVar()`` in this way will always return an object.
 
-**Get Specific Data from JSON**
+Get Specific Data from JSON
+===========================
 
 You can get a specific piece of data from a JSON stream by passing a variable name into ``getVar()`` for the
 data that you want or you can use "dot" notation to dig into the JSON to get data that is not on the root level.
@@ -127,7 +129,8 @@ correct ``CONTENT_TYPE`` header.
 
 .. note:: See the documentation for :php:func:`dot_array_search()` in the ``Array`` helper for more information on "dot" notation.
 
-**Retrieving Raw data (PUT, PATCH, DELETE)**
+Retrieving Raw data (PUT, PATCH, DELETE)
+========================================
 
 Finally, you can grab the contents of php://input as a raw stream with ``getRawInput()``:
 
@@ -137,7 +140,8 @@ This will retrieve data and convert it to an array. Like this:
 
 .. literalinclude:: incomingrequest/013.php
 
-**Filtering Input Data**
+Filtering Input Data
+====================
 
 To maintain security of your application, you will want to filter all input as you access it. You can
 pass the type of filter to use as the second parameter of any of these methods. The native ``filter_var()``