php 对象方式传入参数

class Object { ???/** ????* 基本配置信息 ????* @var array ????*/ ???private $config = array( ???????‘dbms‘=> ???‘mysql‘, ???//数据库类型 ???????‘host‘=> ???‘localhost‘,//数据库主机名 ???????‘dbName‘=> ?‘back‘, ???//使用的数据库 ???????‘user‘=> ???‘root‘, ????//数据库连接用户名 ???????‘pass‘=> ???‘‘, ?????????//对应的密码 ???????‘char‘=> ???‘utf8‘, ?// 字符集 ???????‘long_conn‘=>false, // 是否是长连接 ???); ???// 数据连接 dsn ???private $dsn=""; ???private static $_instance = null; ???/** 初始化对象 ????* @parem $config ?array ????* */ ???private function __construct($config = array()) ???{ ???????$this->config ??= ??array_merge($this->config,$config); ???????$this->str_dsn(); ???} ???//公有化获取实例方法 ???public static function getInstance(){ ???????if (!(self::$_instance instanceof Singleton)){ ???????????self::$_instance = new Object(); ???????} ???????return self::$_instance; ???} ???//私有化克隆方法 ???private function __clone(){ ???} ???// 拼接dsn 连接字符串 ???private function str_dsn() ???{ ???????return ?$this->dsn="$this->dbms:host=$this->host;dbname=$this->dbName;charset=$this->char"; ???} ???// pdo 连接 ???public ?function conn() ???{ ???????if($this->config[‘long_conn‘]==true) ???????{ ???????????$this->config[‘long_conn‘]=array(PDO::ATTR_PERSISTENT => true); ???????}else ???????{ ???????????$this->config[‘long_conn‘]=array(); ???????} ???????try {
　　　　　　　// 实例化 PDO 对象 ???????????$pdo = new PDO($this->dsn, $this->config[‘user‘], $this->config[‘pass‘],$this->config[‘long_conn‘]); ????????????echo ‘对象：‘; ???????????var_dump($pdo); ???????????echo "<br/>"; ???????????echo ‘参数 user 值: ‘.$this->user; ???????} catch (PDOException $e) { ???????????die ("Error!: " . $e->getMessage() . "<br/>"); ???????} ???} ???/** ????* 使用 $this->name 获取配置 ????* @param ?string $name 配置名称 ????* @return multitype ???配置值 ????*/ ???public function __get($name) ???{ ???????return $this->config[$name]; ???} ???public function __set($name,$value) ???{ ???????if(isset($this->config[$name])) ???????{ ???????????$this->config[$name] = $value; ???????} ???} ???public function __isset($name) ???{ ???????return isset($this->config[$name]); ???}}

$singleton=Object::getInstance();$singleton->pass="admin";$singleton->conn();echo "<br/>";$singleton->conn();

对象：object(PDO)#2 (0) { } 参数 user 值: root对象：object(PDO)#2 (0) { } 参数 user 值: root