Your function should be called correspondingly to the column name in the table.

For example if column is named 'abc', function should be called 'parseUserInfo_abc()'. Then this function should be pasted in bb_plugins.php (possible by $action condition).

Refer to this article for more:

Adding new profile field in miniBB

It already contains example of the date function...

My god that was easy. My column name was "birthdate", so the solution is:

setup_options.php:

$userInfoInPosts=array('birthdate');

main_posts_cell.html:

<strong>Age:</strong> {$userInfo_birthdate[$poster_id]}

bb_plugins.php:

function parseUserInfo_birthdate($birthdate){
//code to convert yyyy-mm-dd to age.
}

Thanks Paul!

My god that was easy.

- sure ;-) I myself dislike complicated things so I don't create them... Welcome.