/** * @return string sql to add to where statement. */ function get_sql_where() { $filter = optional_param('filter', '', PARAM_NOTAGS); list($wsql, $wparams) = parent::get_sql_where(); if ($filter !== '') { $wsql .= ($wsql ? ' AND ' : '') . 'tg.name LIKE :tagfilter'; $wparams['tagfilter'] = '%' . $filter . '%'; } return array($wsql, $wparams); }