php单例模式连接mysql数据库备忘
php备忘
<?php
class Db{
static private $_instance;
static private $_connectSource;
private $_dbConfig = array(
'host'=>'127.0.0.1',
'username'=>'root',
'password'=>'123456',
'database'=>'qq',
);
private function __construct(){
}
static public function getInstance(){
if(!(self::$_instance instanceof self)){
self::$_instance = new self();
}
return self::$_instance;
}
public function connect(){
if(!self::$_connectSource){
self::$_connectSource = @mysql_connect($this->_dbConfig['host'],$this->_dbConfig['username'],$this->_dbConfig['password']);
if(!self::$_connectSource){
die("mysql connect error".mysql_error());
}
mysql_select_db($this->_dbConfig['database'],self::$_connectSource);
mysql_query("set names UTF8",self::$_connectSource);
}
return self::$_connectSource;
}
}
$connect = Db::getInstance()->connect();
var_dump($connect);
?>