``` $var(rc) = save("location", 0x04); if (!$var(rc)) { xlog("L_ERR", "-- REGISTRAR: failed to save registration: $tu => UA: $ua, IP: $si:$sp, Caller-ID: $ci, CSeq: $cs, Expiry: $hdr(Expires), Contact $ct, Return code: $var(rc)\n"); sl_reply_error(); exit; }
if ($hdr(Expires) == "") { $var(expire) = $sel(contact.expires); } else { $var(expire) = $hdr(Expires); } $var(regtime) = $xavp(ulrcd[0]=>expires);
```