add note about underscore-preixed properties

php-fig · May 10, 2012 · d05236c · d05236c
1 parent dca8fc2
commit d05236c
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diff --git a/proposed/PSR-2-advanced.md b/proposed/PSR-2-advanced.md
@@ -168,6 +168,10 @@ class ClassName extends ParentClass implements
 Declare visibility on all properties. Do not use `var` to declare a property.
 Declare only one property per statement.
 
+> N.b. Some projects prefix property names with a single underscore to indicate
+> protected or private visibility. This guide discourages but does not
+> disallow that practice.
+
 A property declaration looks like the following.
 
 ```php