php_script/DB_PDO.class...

<?php

/** 
 * 数据库pdo连接 
 */  
class DB_PDO{ 
        
    private static $pdo;       
    private function __construct(){  
         
    }   

    /** 
     * 获取实例化的PDO，单例模式 
     * @return PDO 
     */  
    public static function getInstance($dbConf){  
        if(!(self::$pdo instanceof PDO)){  
            $dsn ="mysql:host=".$dbConf['host'].";port=".$dbConf['port'].";dbname=".$dbConf['dbName'];  
            try {  
                self::$pdo = new PDO($dsn,$dbConf['user'], $dbConf['password'], array(PDO::ATTR_PERSISTENT => true,PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8")); //保持长连接  
                self::$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);  
            } catch (PDOException $e) {  
                print "Error:".$e->getMessage()."<br/>";  
                die();  
            }  
        }  
        return self::$pdo;  
    }  
}