Clarify when we are talking about PHP and Twig

In the description for versioned URLs and absolute URLs for assets, it was not clear if we were talking about Twig or PHP. Also we are usually first talking about Twig and then PHP, not the other way around

Author: Carlos Granados

book/templating.rst

@@ -1029,8 +1029,8 @@ configuration option.
 
 .. _`book-templating-version-by-asset`:
 
-If you need to set a version for a specific asset, you can set the fourth
-argument (or the ``version`` argument) to the desired version:
+If you need to set a version for a specific asset, you can set the ``version`` argument
+if you are using Twig (or the fourth argument if you are using PHP) to the desired version:
 
 .. configuration-block::
 
@@ -1051,8 +1051,8 @@ If you don't give a version or pass ``null``, the default package version
 (from :ref:`ref-framework-assets-version`) will be used. If you pass ``false``,
 versioned URL will be deactivated for this asset.
 
-If you need absolute URLs for assets, you can set the third argument (or the
-``absolute`` argument) to ``true``:
+If you need absolute URLs for assets, you can set the ``absolute`` argument
+if you are using Twig (or the third argument if you are using PHP) to ``true``:
 
 .. configuration-block::