单例模式
Posted ~灵动奇迹~
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<?php
class Db{
static private $_instance;
static private $_connectSource;
private $_dbConfig = [
‘host‘ => ‘127.0.0.1‘,
‘user‘ => ‘root‘,
‘password‘ => ‘‘,
‘database‘ => ‘hanling‘
];
private function __construct(){
}
static public function getInstance(){
if(!(self::$_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[‘user‘],$this->_dbConfig[‘password‘]);
if(!self::$_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);//资源
?>
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