<?php???

/**?

????@DB?Operates?For?PDO?

????@author:MeeeeN?

????@date:2015-10-22?22:40:32?

**/??

??

????//定義數(shù)據(jù)庫(kù)信息??

??????

????header("Content-type:text/html;?charset=utf-8");??

??

????define('DB_HOST',?'localhost');??

????define('DB_USER',?'root');??

????define('DB_PWD',?'');??

????define('DB_NAME',?'lesson');??

??

????class?DBPDO?{??

??

????????private?static?$instance;?????????

????????public?$dsn;?????????

????????public?$dbuser;?????????

????????public?$dbpwd;?????????

????????public?$sth;?????????

????????public?$dbh;???

??

????????//初始化??

????????function?__construct()?{??

????????????$this->dsn?=?'mysql:host='.DB_HOST.';dbname='.DB_NAME;??

????????????$this->dbuser?=?DB_USER;??

????????????$this->dbpwd?=?DB_PWD;??

????????????$this->connect();??

????????????$this->dbh->query("SET?NAMES?'UTF8'");??

????????????$this->dbh->query("SET?TIME_ZONE?=?'+8:00'");??

????????}??

??

????????//連接數(shù)據(jù)庫(kù)??

????????public?function?connect()?{??

????????????try?{??

????????????????$this->dbh?=?new?PDO($this->dsn,?$this->dbuser,?$this->dbpwd);??

????????????}??

????????????catch(PDOException?$e)?{??

????????????????exit('連接失敗:'.$e->getMessage());??

????????????}??

????????}??

??

????????//獲取表字段??

????????public?function?getFields($table='vista_order')?{??

????????????$this->sth?=?$this->dbh->query("DESCRIBE?$table");??

????????????$this->getPDOError();??

????????????$this->sth->setFetchMode(PDO::FETCH_ASSOC);??

????????????$result?=?$this->sth->fetchAll();??

????????????$this->sth?=?null;??

????????????return?$result;??

????????}??

??

????????//插入數(shù)據(jù)??

????????public?function?insert($sql)?{??

????????????if($this->dbh->exec($sql))?{??

????????????????$this->getPDOError();??

????????????????return?$this->dbh->lastInsertId();??

????????????}??

????????????return?false;??

????????}??

??

????????//刪除數(shù)據(jù)??

????????public?function?delete($sql)?{??

????????????if(($rows?=?$this->dbh->exec($sql))?>?0)?{??

????????????????$this->getPDOError();??

????????????????return?$rows;??

????????????}??

????????????else?{??

????????????????return?false;??

????????????}??

????????}??

??

????????//更改數(shù)據(jù)??

????????public?function?update($sql)?{??

????????????if(($rows?=?$this->dbh->exec($sql))?>?0)?{??

????????????????$this->getPDOError();??

????????????????return?$rows;??

????????????}??

????????????return?false;??

????????}??

??

????????//獲取數(shù)據(jù)??

????????public?function?select($sql)?{??

????????????$this->sth?=?$this->dbh->query($sql);??

????????????$this->getPDOError();??

????????????$this->sth->setFetchMode(PDO::FETCH_ASSOC);??

????????????$result?=?$this->sth->fetchAll();??

????????????$this->sth?=?null;??

????????????return?$result;??

????????}??

??

????????//獲取數(shù)目??

????????public?function?count($sql)?{??

????????????$count?=?$this->dbh->query($sql);??

????????????$this->getPDOError();??

????????????return?$count->fetchColumn();??

????????}??

??

????????//獲取PDO錯(cuò)誤信息??

????????private?function?getPDOError()?{??

????????????if($this->dbh->errorCode()?!=?'00000')?{??

????????????????$error?=?$this->dbh->errorInfo();??

????????????????exit($error[2]);??

????????????}??

????????}??

??

????????//關(guān)閉連接??

????????public?function?__destruct()?{??

????????????$this->dbh?=?null;??

????????}??

????}??

??

????//eg:?an?example?for?operate?select??

??

????$test?=?new?DBPDO;??

??

????$sql?=?"SELECT?*?FROM?`vista_order`?WHERE?`id`!=100?";??

??

????$rs?=?$test->select($sql);??

??

????print_r($rs);??

??????

??

??

??

??

?>??

這是之前研究了一段時(shí)間pdo后所寫(xiě)出來(lái)的一個(gè)pdo數(shù)據(jù)庫(kù)相關(guān)操作類(lèi)（比較懶，一直沒(méi)更新博客），參考了一些網(wǎng)上的相關(guān)文章，但是感覺(jué)很多要么寫(xiě)得有錯(cuò)誤，要么很啰嗦，所以自己搞了個(gè)，其實(shí)本來(lái)我是一直是用MySQL類(lèi)連接的，但是升級(jí)了PHP版本后發(fā)現(xiàn)不支持mysql方式連接了，又感覺(jué)mysqli比較啰嗦，所以索性改為用pdo，其實(shí)基本功能來(lái)說(shuō)的話，這個(gè)類(lèi)中construct，connection，destruct三個(gè)function就足夠了，不過(guò)方便快速使用的話還是多寫(xiě)了一些function，個(gè)人感覺(jué)這個(gè)類(lèi)的可移植性還是蠻高的，最后有使用的例子，基本上引用DBPDO類(lèi)之后，只要自己寫(xiě)好sql語(yǔ)句，增刪改查就都可以實(shí)現(xiàn)了

來(lái)源:http://blog.csdn.net/meeeen7/article/details/52136474

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