Template:Ifdef

Description
Allows conditional code for optional parameters. If the parameter  is defined, the string   is inserted. The template is the opposite of Template:Ifndef. It is necessary, because the MediaWiki of Sourceforge here has not got the extended parser function like. For further details, look at the Wikipedia pages Template:Ifdef and Help:Advanced templates#Branching techniques without ParserFunctions.

Example
If the parameter  is defined, the code results in


 * colspan="2" | http://a.url
 * colspan="2" | http://a.url

If it is not defined, the code results in nothing.