<?php
/**
* ipdo.php
*
* discription
*
* @filename ipdo.php
* @version v1.0
* @update 2011-4-27
* @author randy.hong
* @contact homingway@163.com
* @package pdo
*/
//DB config
define('DB_HOST', 'localhost');
define('DB_PORT', '3306');
define('DB_USER', 'root');
define('DB_PASSWD', '123456');
define('DB_CHARSET','utf8');
class IPDO {
/**
* The singleton instance
*/
static public $PDOInstance;
/**
* Creates a PDO instance representing a connection to a database and makes the instance available as a singleton
* @return PDO
*/
public function __construct(){
$dsn = 'mysql:host='.DB_HOST.';port='.DB_PORT.';dbname='.DB_NAME;
$driver_options = array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES ".DB_CHARSET);
if(!self::$PDOInstance) {
try {
self::$PDOInstance = new PDO($dsn, DB_USER, DB_PASSWD, $driver_options);
self::$PDOInstance->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
die($e->getMessage());
}
}
return self::$PDOInstance;
}
}
//使用
$pdo = new IPDO();
?>
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