[Mediawiki-l] The opposite of wfMsg()?

[Daniel Barrett]

I have an app that depends on a particular system message that might not
exist yet.

What is the correct way to accomplish the following logic in an
extension?

if (!wfMsg('my-message')) {
   set 'my-message' to a default value
}
$wgOut->addWikiText(wfMsg('my-message'));

Thanks,
DanB


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