Question

所以我尝试并且可能失败了，写了一个“mixin”类。它大部分都可以正常工作，直到您有一个类传递的多个参数，然后世界崩溃。我的班级是这样的：

class AisisCore_Loader_Mixins {

    private $_classes;

    private $_class_objects = array();

    private $_methods = array();

    public function __construct(){
        $this->init();
    }

    public function init(){}

    public function setup($class){
        if(!is_array($class)){
            throw new AisisCore_Loader_LoaderException('Object passed in must be of type $class_name=>$params.');
        }

        $this->_classes = $class;
        $this->get_class_objects();
        $this->get_methods();    
    }

    public function get_class_objects(){
        foreach($this->_classes as $class_name=>$params){
            $object = new ReflectionClass($class_name);
            $this->_class_objects[] = $object->newInstance($params);
        }
    }

    public function get_methods(){
        foreach($this->_class_objects as $class_object){
            $this->_methods = get_class_methods($class_object);
        }
    }

    public function call_function($name, $param = null){
        foreach($this->methods as $method){
            $this->isParam($method, $param);
        }
    }

    private function isParam($method, $param){
        if($param != null){
            call_user_func($method, $param);
        }else{
            call_user_func($method);
        }        
    }
}

并且扩展并在“桥”类中使用：

class AisisCore_Template_Helpers_Loop_LoopMixins extends AisisCore_Loader_Mixins{

    private $_options;

    private $_wp_query;

    private $_post;  

    private $_components;

    public function __construct($options){
        parent::__construct();
        global $wp_post, $post;

        if(isset($options)){
          $this->_options = $options;
        }

        if(null === $wp_query){
          $this->_wp_query = $wp_query;
        }

        if(null === $post){
          $this->_post = $post;
        }

        $this->_components = new AisisCore_Template_Helpers_Loop_LoopComponents($this->_options);

        $this->setup(array(
            'AisisCore_Template_Helpers_Loop_Helpers_Loops_Single' => array($options, $this->_components),
            'AisisCore_Template_Helpers_Loop_Helpers_Loops_Query' => array($options, $this->_components),
            'AisisCore_Template_Helpers_Loop_Helpers_Loops_Page' => array($options, $this->_components),
        ));
    }

    public function init(){
        parent::init();
    }
}

问题是什么？

Warning: Missing argument 2 for AisisCore_Template_Helpers_Loop_Helpers_Loops_Single::__construct() 
Warning: Missing argument 2 for AisisCore_Template_Helpers_Loop_Helpers_Loops_Query::__construct() 
Warning: Missing argument 2 for AisisCore_Template_Helpers_Loop_Helpers_Loops_Page::__construct()

我想做类似的事情：

array($options, $this->_components)

获取该类的参数，将其包装在一个数组中，然后newInstanceArgs破坏该数组将两个参数放入类中。换句话说，我以为我传递了两个参数??

Answer 1

错误消息告诉您到底出了什么问题：

Warning: Missing argument 2 for BlahBlahBlah::__construct()

所以问题是当你在这里实例化一个对象时，你的所有参数都没有被传递给构造函数：

$this->_class_objects[] = $object->newInstance($params);

如果您查阅ReflectionClass::newInstance^docs的相关文档，您会看到：

创建该类的新实例。给定的参数传递给类构造函数。

因此，无论您在$params数组中有多少元素，您只能使用当前方法将Argument 1传递给构造函数。解决方案是使用ReflectionClass::newInstanceArgs^docs，因为这会扩展参数数组并将它们作为单独的参数传递给构造函数：

$this->_class_objects[] = $object->newInstanceArgs($params);

PHP中的反射类和参数

1 个答案: