[SR-Users] Stripping variable amount of digits

Hi, I get a prefix string from a database and store it in $var(prefix). Such prefix can contain any number of digits (no fixed length). Now I must to check if the RURI username begins with that prefix and in that case strip it. I can get the first step (detect it) using pcre_match function: if pcre_match("$rU", "^$var(prefix)") { # Prefix match. But I cannot get the second part working (stripping it). I've tryed everything: - strip() is not valid as just allows an integer (no pv). - subst_user() doesn't accept pv: if subst_user("/^$var(prefix)(.*)$/\1/") Any ideas please? Thanks a lot. -- Iñaki Baz Castillo <ibc(a)aliax.net>