从变量实例化新对象

时间:2011-05-11 12:20:58

标签: php

我正在使用以下类来自动加载我的所有课程。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';
     }
}

我在我的核心类__construct()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:

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;
}

但是我在调​​用$core-template时遇到以下错误:

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行的/home/fabian/domains/fabianpas.nl/public_html/framework/index.php中未定义的属性:SH_Core :: $ template   致命错误:在第8行的/home/fabian/domains/fabianpas.nl/public_html/framework/index.php中的非对象上调用成员函数loadPage()

它自动加载类但不启动对象,因为使用以下代码它可以正常工作:

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

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

2 个答案:

答案 0 :(得分:8)

你试过了吗?

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

代替?

答案 1 :(得分:0)

我用以下方法解决了它:

private function createObjects() {
    $handle = opendir('./includes/classes/');
    if ($handle) {
        while (false !== ($file = readdir($handle))) {
            if ($file != "." && $file != "..") {
                $object_name = str_replace(".php", "", $file);
                if ($object_name != "core") {
                    $class_name = "SH_" . ucfirst($object_name);
                    $this->$object_name = new $class_name();
                }
            }
        }
        closedir($handle);
    }
}