Habari\DatabaseConnection::exists PHP Метод

    public function exists($table, $keyfieldvalues)
    {
        $qry = "SELECT 1 as c FROM {$table} WHERE 1=1 ";
        $values = array();
        foreach ($keyfieldvalues as $keyfield => $keyvalue) {
            $qry .= " AND {$keyfield} = ? ";
            $values[] = $keyvalue;
        }
        $result = $this->get_row($qry, $values);
        return $result !== false;
    }