PHP对象实例化
class test { protected static $_instance = null; private $path = null; /** * 实例化 */ public static function getInstance() { if( !self::$_instance instanceof self ) { self::$_instance = new self; } return self::$_instance; } protected function __construct() { $this->path = '/app/'; } public function out() { echo $this->path; } // ..... } test::getInstance()->out();