|concat{value1, value2, ...}

|concat{value1,value2,...} is used to concatenate one or character strings to the value of the function used as input.

Example: Concatenate a customised extra field to the raw body text of an article and then run the standard SPIP cleaning filter with:

#TEXTE*|concat{"<br/>Introductory header to the extra field<br/>",#EXTRA_FIELD2,...}|propre