pcre_replace_callback

pcre_replace_callback() - string replace uses a callback to get the replace string

string pcre_replace_callback(string, string, string | function, ...);

returns a string where all captured groups have been replaced by the
return value of function pointe fun or function fun in object ob.
(called with the matched string and match number, starting with 0)

pcre_assoc(3), pcre_cache(3), pcre_extract(3), pcre_replace(3)