Placeholder types
Submitted by Svetoslav Stoyanov on Tue, 2017-05-09 20:09@variable — Use this style of placeholder for most use-cases. Special characters in the text will be converted to HTML entities.
%variable — Use this style of placeholder to pass text through drupal_placeholder() which will result in HTML escaped text, then wrapped with tags.
:variable — Use this style of placeholder when substituting the value of an href attribute. Values will be HTML escaped, and filtered for dangerous protocols.