function wfRegexBlockClearExpired($username, $blocker)
{
    $dbw =& wfGetDB(DB_MASTER);
    $query = "DELETE FROM " . wfRegexBlockGetTable() . " WHERE blckby_name = " . $dbw->addQuotes($username);
    $dbw->query($query);
    if ($dbw->affectedRows()) {
        /* success, remember to delete cache key  */
        wfRegexBlockUnsetKeys($blocker, $username);
        return true;
    }
    return false;
}
 function doSubmit()
 {
     global $wgOut, $wgUser, $wgMemc;
     /* empty name */
     if (strlen($this->mRegexBlockedAddress) == 0) {
         $this->showForm(wfMsg('regexblock-form-submit-empty'));
         return;
     }
     /* castrate regexes */
     if (!($simple_regex = wfValidRegex($this->mRegexBlockedAddress))) {
         /* now, very generic comment - should the conditions change, this should too */
         $this->showForm(wfMsg('regexblock-form-submit-regex'));
         return;
     }
     /* check expiry */
     if (strlen($this->mRegexBlockedExpire) == 0) {
         $this->showForm(wfMsg('regexblock-form-submit-expiry'));
         return;
     }
     /* TODO - check infinite */
     if ($this->mRegexBlockedExpire != 'infinite') {
         $expiry = strtotime($this->mRegexBlockedExpire);
         if ($expiry < 0 || $expiry === false) {
             $this->showForm(wfMsg('ipb_expiry_invalid'));
             return;
         }
         $expiry = wfTimestamp(TS_MW, $expiry);
     } else {
         $expiry = $this->mRegexBlockedExpire;
     }
     /* make insert */
     $dbw =& wfGetDB(DB_MASTER);
     $name = $wgUser->getName();
     $timestamp = wfTimestampNow();
     $query = "INSERT IGNORE INTO " . wfRegexBlockGetTable() . "\n\t\t\t  (blckby_id, blckby_name, blckby_blocker, blckby_timestamp, blckby_expire, blckby_exact, blckby_create, blckby_reason)\n\t\t\t  VALUES (null,\n\t\t\t\t  {$dbw->addQuotes($this->mRegexBlockedAddress)},\n\t\t\t\t  {$dbw->addQuotes($name)},\n\t\t\t\t  '{$timestamp}',\n\t\t\t\t  '{$expiry}',\n\t\t\t\t  {$this->mRegexBlockedExact},\n\t\t\t\t  {$this->mRegexBlockedCreation},\n\t\t\t\t  {$dbw->addQuotes($this->mRegexBlockedReason)}\n\t\t\t\t )";
     $dbw->query($query);
     /* duplicate entry */
     if (!$dbw->affectedRows()) {
         $this->showForm(wfMsg('regexblock-already-blocked', $this->mRegexBlockedAddress));
         return;
     }
     wfRegexBlockUnsetKeys($name, $this->mRegexBlockedAddress);
     /* redirect */
     $titleObj = Title::makeTitle(NS_SPECIAL, 'Regexblock');
     $wgOut->redirect($titleObj->getFullURL('action=success_block&ip=' . urlencode($this->mRegexBlockedAddress) . "&" . wfGetListBits()));
 }