php投票系统简单实现源码(1/3)

--
-- 表的结构 `count_voting`
--

DROP TABLE IF EXISTS `count_voting`;
CREATE TABLE IF NOT EXISTS `count_voting` (
  `SelectName` varchar(40) NOT NULL,
  `LabelName` varchar(40) NOT NULL,
  `CountVotes` bigint(20) unsigned NOT NULL,
  UNIQUE KEY `SelectName` (`SelectName`),
  KEY `CountVotes` (`CountVotes`),
  KEY `CountVotes_2` (`CountVotes`),
  KEY `CountVotes_3` (`CountVotes`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='投票统计表';

-- --------------------------------------------------------

--
-- 表的结构 `ip_votes`
--

DROP TABLE IF EXISTS `ip_votes`;
CREATE TABLE IF NOT EXISTS `ip_votes` (
  `ID` bigint(20) unsigned NOT NULL auto_increment COMMENT '投票人序号：自增',
  `IP` varchar(15) NOT NULL COMMENT '投票人IP',
  `Location` varchar(40) NOT NULL COMMENT '投票人位置',
  `VoteTime` datetime NOT NULL,
  `SelectName` varchar(40) NOT NULL,
  PRIMARY KEY  (`ID`),
  KEY `ID` (`ID`),
  KEY `SelectName` (`SelectName`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=4 ;

--
-- 触发器 `ip_votes`
--
DROP TRIGGER IF EXISTS `vote_count_after_insert_tr`;
DELIMITER //
CREATE TRIGGER `vote_count_after_insert_tr` AFTER INSERT ON `ip_votes`
 FOR EACH ROW UPDATE count_voting SET CountVotes = CountVotes + 1 WHERE SelectName = NEW.SelectName
//
DELIMITER ;

-- --------------------------------------------------------

--
-- 表的结构 `user`
--

DROP TABLE IF EXISTS `user`;
CREATE TABLE IF NOT EXISTS `user` (
  `name` varchar(10) NOT NULL COMMENT '管理员用户名',
  `passwd` char(32) NOT NULL COMMENT '登录密码MD5值'
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='用户表';

--
-- 转存表中的数据 `user`
--

INSERT INTO `user` (`name`, `passwd`) VALUES
('ttxi', '700469ca1555900b18c641bf7b0a1fa1'),
('jitttanwa', 'adac5659956d68bcbc6f40aa5cd00d5c');

--
-- 限制导出的表
--

--
-- 限制表 `ip_votes`
--
ALTER TABLE `ip_votes`
  ADD CONSTRAINT `ip_votes_ibfk_1` FOREIGN KEY (`SelectName`) REFERENCES `count_voting` (`SelectName`) ON DELETE CASCADE ON UPDATE CASCADE;

/**
 * 操作数据库
 * 封装PDO，使其方便自己的操作
 */
class OperatorDB
{
    //连接数据库的基本信息
    private $dbms='mysql';       //数据库类型,对于开发者来说，使用不同的数据库，只要改这个.
    private $host='localhost';       //数据库主机名
    private $dbName='voting';     //使用的数据库
    private $user='voting';       //数据库连接用户名
    private $passwd='voting';     //对应的密码
    private $pdo=null;

    public function  __construct()
    {
        //dl("php_pdo.dll");
        //dl("php_pdo_mysql.dll");
        $this->dsn="$this->dbms:host=$this->host;dbname=$this->dbName";
        try
        {
            $this->conn=new PDO($this->dsn,$this->user,$this->passwd);//初始化一个PDO对象，就是创建了数据库连接对象$db
        }
        catch(PDOException $e)
        {
            die("
数据库连接失败(creater PDO Error！): ".$e->getMessage()."
");
        }
    }
    public function __destruct()
    {
        $this->pdo = null;
    }
    public function exec($sql)
    {
    }
    public function query($sql)
    {
    }
}

require_once 'OperatorDB.php';
class OperatorVotingDB
{
    private $odb;

    public function  __construct()
    {
        $this->odb = new OperatorDB();
    }
    public function __destruct()
    {
        $this->odb = null;
    }

    /**
     * 清空Voting数据中的所有表
     *
     * 调用数据库操作类，执行clear数据库的操作
     */
    public function clearTables()
    {
        $sqls = array("TRUNCATE ip_votes;","TRUNCATE count_voting;");
        $this->odb->exec($sqls[0]);
        $this->odb->exec($sqls[1]);
    }

    /**
     * 重置count_voting表中的CountValues字段为0
     *
     */
    public function resetCountValues()
    {
        $sql = "UPDATE count_voting SET CountVotes = 0;";
        $this->odb->exec($sql);
    }

    /**
     * 投票
     * 将信息写入ip_votes表
     * @param type $ip
     * @param type $loc
     * @param type $time
     * @param type $name
     */
    public function vote($ip,$loc,$name)
    {
        $sql = "INSERT INTO ip_votes VALUES (NULL, '$ip', '$loc', NOW(), '$name')";
        $subsql = "SELECT MAX(to_days(VoteTime)) FROM ip_votes WHERE IP='$ip'";
        $stm = $this->odb->query($subsql);
        if (count($row=$stm->fetchAll())==1)
        {
            $now = date("Y-m-d H:i:s");
            $subsql = "SELECT to_days('$now');";
            $stm = $this->odb->query($subsql)->fetch();
            $time = $stm[0];//使用mysql计算出的today时间
//            echo $time."
";
//            echo $row[0][0];
            if ($time-$row[0][0]            {
                echo "投票失败，相同ip需要隔一天才能投票";
                return;
            }
        }
//        echo $sql;
        echo "投票成功!";
        $this->odb->exec($sql);
    }

    /**
     * 添加SelectName字段的行
     *
     * @param string $name
     * @param string $label
     * @param int $count
     */
    public function addSelectName($name, $label, $count=0)
    {
        $sql = "INSERT INTO count_voting VALUES ('$name', '$label', $count);";
        $this->odb->exec($sql);
    }

    /**
     * 获取总投票情况,按票数排序的结果
     *
     * 按CountVotes字段排序，返回count_voting表
     *
     * @param int $n
     *
     */
    public function getVotesSortByCount($n=-1)
    {
        $sql = "SELECT * FROM count_voting ORDER BY CountVotes DESC LIMIT 0 , $n;";
        if (-1 == $n)
        {
            $sql = "SELECT * FROM count_voting ORDER BY CountVotes DESC;";
        }
//        echo $sql;
        return $this->odb->query($sql);
    }

    /**
     * 获取投票情况,按票数排序并按标签分组的结果
     *
     * 按CountVotes字段排序并按LabelName字段分组，返回count_voting表
     */
    public function getVotesGroupByLabel()
    {
        $sql = "SELECT * FROM count_voting ORDER BY LabelName DESC;";
//        echo $sql;
        return $this->odb->query($sql);
    }
}
?>