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PHP的PDO操作简单示例
本文实例讲述了PHP的简单PDO操作。分享给大家供大家参考,具体如下:
网上关于PDO的资料很多。这里就不累赘了。
这里我将PDO所有操作封装到一个类里方便操作。
类代码如下:
- class DB {
- //pdo对象
- public $con = NULL;
- function DB()
- {
- $this->con = new PDO("mysql:host=127.0.0.1;dbname=dbtest", "root", "xxx", array(
- PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES `utf8`',
- PDO::ATTR_PERSISTENT => TRUE,
- ));
- $this->con->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
- $this->con->setAttribute(PDO::ATTR_CASE, PDO::CASE_UPPER);
- }
- public function query($sql, $para = NULL)
- {
- $sqlType = strtoupper(substr($sql, 0, 6));
- $cmd = $this->con->prepare($sql);
- if($para != NULL)
- {
- $cmd->execute($para);
- }
- else
- {
- $cmd->execute();
- }
- if($sqlType == "SELECT")
- {
- return $cmd->fetchAll();
- }
- if($sqlType == "INSERT")
- {
- return $this->con->lastInsertId();
- }
- return $cmd->rowCount();
- }
- }
使用方法:
- include "pdo.php";
- $db = new DB();
- $subjectList = $db->query("SELECT * FROM `table1`");
- $count = $db->query("UPDATE `table1` SET `name` = 'test' WHERE `id` = :id", array(':id' => 795));
- try
- {
- echo $db->con->beginTransaction();
- $count = $db->con->exec("UPDATE `table1` SET `name` = 'test1' WHERE `id` = 795");
- $count = $db->con->exec("UPDATE `table1` SET `name1` = 'test22' WHERE `id` = 795");
- $count = $db->con->exec("UPDATE `table1` SET `name1` = 'test333' WHERE `id` = 795");
- echo $db->con->commit();
- }
- catch (Exception $e)
- {
- // MYSQL 的表类型 InnoDB(支持事务) MyISAM(不支持事务)
- echo $db->con->rollBack();
- throw new MyException("事务测试错误", $e);
- }
- $db = NULL;