diff --git a/en/core-libraries/global-constants-and-functions.rst b/en/core-libraries/global-constants-and-functions.rst
index aadb8cb856..f5bf4b79f8 100644
--- a/en/core-libraries/global-constants-and-functions.rst
+++ b/en/core-libraries/global-constants-and-functions.rst
@@ -97,6 +97,10 @@ such as debugging and translating content.
 
 .. php:function:: debug(mixed $var, boolean $showHtml = null, $showFrom = true)
 
+    .. versionadded:: 3.3.0
+        Calling this method will return passed ``$var``, so that you can, for instance,
+        place it in return statements.
+
     If the core ``$debug`` variable is ``true``, ``$var`` is printed out.
     If ``$showHTML`` is ``true`` or left as ``null``, the data is rendered to be
     browser-friendly.
@@ -137,11 +141,19 @@ such as debugging and translating content.
 
 .. php:function:: pr(mixed $var)
 
+    .. versionadded:: 3.3.0
+        Calling this method will return passed ``$var``, so that you can, for instance,
+        place it in return statements.
+
     Convenience wrapper for ``print_r()``, with the addition of
     wrapping ``<pre>`` tags around the output.
 
 .. php:function:: pj(mixed $var)
 
+    .. versionadded:: 3.3.0
+        Calling this method will return passed ``$var``, so that you can, for instance,
+        place it in return statements.
+
     JSON pretty print convenience function, with the addition of
     wrapping ``<pre>`` tags around the output.