uiisc/library/dbpdo.php

<?php
/**
 * 数据库pdo连接
 */
class DBPDO
{
    private static $pdo;

    private function __construct()
    {
        //code
    }
    private function __clone()
    {
        //code
    }
    /**
     * 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'] . ";charset=" . $dbConf['charset'];
            try {
                self::$pdo = new PDO($dsn, $dbConf['username'], $dbConf['password']); // , array(PDO::ATTR_PERSISTENT => true, PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8")); // 保持长连接
                self::$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
            } catch (PDOException $e) {
                print "Error:" . $e->getMessage() . "<br/>";
                die();
            }
        }
        return self::$pdo;
    }
}