从变量实例化新对象

Question

我正在使用以下类来自动加载我的所有类.这个类扩展了核心类.

class classAutoloader extends SH_Core {

     public function __construct() {
        spl_autoload_register(array($this, 'loader'));      
     }

     private function loader($class_name) {
        $class_name_plain = strtolower(str_replace("SH_", "", $class_name));
        include $class_name_plain . '.php';
     }
}

我在__construct()我的核心类中实例化该类:

public function __construct() {
    $autoloader = new classAutoloader();
}

现在我希望能够在loader类中实例化对象,如下所示:

private function loader($class_name) {
    $class_name_plain = strtolower(str_replace("SH_", "", $class_name));
    include $class_name_plain . '.php';
    $this->$class_name_plain = new $class_name;
}

但是我收到以下错误,这样调用$core-template:

require 'includes/classes/core.php';
$core = new SH_Core();

if (isset($_GET['p']) && !empty($_GET['p'])) {
    $core->template->loadPage($_GET['p']);
} else {
    $core->template->loadPage(FRONTPAGE);   
}

错误:

注意:第8行/home/fabian/domains/fabianpas.nl/public_html/framework/index.php中的未定义属性:SH_Core :: $ template
致命错误:在/中的非对象上调用成员函数loadPage()第8行的home/fabian/domains/fabianpas.nl/public_html/framework/index.php

它自动加载类,但只是不启动对象,因为使用以下代码它没有任何问题:

public function __construct() {
    $autoloader = new classAutoloader();

    $this->database = new SH_Database();
    $this->template = new SH_Template();
    $this->session = new SH_Session();
}

Answer 1

你有没有尝试过:

$this->$class_name_plain = new $class_name();

代替？