Data stored in the database is presented as a block of text, and you may want to manipulate its value before displaying it on the screen. This is what filters are for:
For example: to split a text tag use
[(#TEXTE|couper{30})]
or transform a date in computer format into a date in human format
Let’s assume that your database contains dated items and undated items. The variable #DATE is "2023-07-01 10-53-01" (date in mySQL format) in the first case, and "0000-00-00 00-00-00" in the second.
[(#AFFDATE|affdate)]
Will display1 July