<?php
namespace Helpers;

class PDO extends \PDO
{
	private $debug = 0;		//调试模式
	
	public $db_cfg;
	
	function __construct($DSN = NULL)
	{

		if(empty($DSN))
		{
			$config_local = \Zend_Registry::get('config');
			$dsn = "pgsql:host={$config_local->db->hostname};"
					."port=5432;"
					."dbname={$config_local->db->database};"
					."user={$config_local->db->username};"
					."password={$config_local->db->password}";
			parent::__construct($dsn);
		}
		
		else{
			
			if(is_string($DSN))
			{
				parent::__construct($DSN);
			}
			
			else{
				$dsn = "pgsql:host={$DSN['host']};"
					."port={$DSN['port']};"
					."dbname={$DSN['db']};"
					."user={$DSN['user']};"
					."password={$DSN['pwd']}";
				parent::__construct($dsn);	
			}
			
		}
	}
	
}