promo.php Includes Behaviour.php and so also allows any database field to be used as a tag. Other tags are:
{{DETAIL_LINK_OPEN}} An opening <a>, the target of which is processed from the contents of the 'internal_link' and 'external_link' fields, 'internal_link' having precedence.
{{DETAIL_LINK_CLOSE}} </a>
{{PROMO_CONTENT}} The contents of the 'message' field.
{{PROMO_HEADER}} An <img /> tag, where the src attribute is $media_dir + the contents of the 'header' field, and the alt attribute is the contents of the 'image_alt' field or, if that is blank, the contents of the 'title' field.
{{PROMO_IMAGE}} An <img /> tag, where the src attribute is $media_dir + the contents of the 'image' field, and the alt attribute is the contents of the 'image_alt' field or, if that is blank, the contents of the 'title' field. This is surrounded by a <div> with the class attribute "promopic".
{{PROMO_IMAGE_THUMB}} The same as PROMO_IMAGE, with the addition, in the <img /> tag, of the style attribute set to the value of $thumb_w from config.php
{{PROMO_LINK}} The contents of the 'title' field in an enclosing <a> tag, of which the href attribute is derived from the contents of the 'internal_link' and 'external_link' fields, 'internal_link' having precedence. NB: This tag is deprecated in favour of DETAIL_LINK_OPEN and DETAIL_LINK_CLOSE.
{{PROMO_TITLE}} The contents of the 'title' field.