我很可能是走错了路，但我不知道如何纠正这一点。。。。如果有人能给我指出正确的方向，那就太好了。如果需要，很乐意提供更多细节。我的问题如下：

我有一个父类，一个需要访问一些父变量的子类，还有一个包含do\\u action调用的页面，就像这样

/****plugin ***/
class PARENT(

    protected $pluginVersion;
    protected $pluginOptions;

    function __construct() {
        $this->pluginVersion=\'1.5\';
        $this->pluginOptions = get_option(\'option_name\',0);

        add_action(\'choose_gateway\', array( $this, \'choose_gateway\'));
    }


    function choose_gateway(){
        /**output some dropdown, select, whatever*/
        echo $str;
    }
}



class CHILD extends PARENT{
        function __construct() {

            $this->gatewayName = \'Cash on Delivery\';
            /**plus some more other vars*/

            /**
                problem:

                here i want to have access/use the variables set in the parent (i.e. $this->pluginOptions)
                initially i thought i can just use
                parent::__construct();

                problem is though - if i do that - the "choose_gateway" action in parent is called twice....

            ***/


            if(!is_admin()){
                add_action(\'some_child_action\', array($this,\'some_child_action\'));
            }
        }
        function some_child_action(){

        }

        /**some more functions**/
}
?>


/**** page***/
<?php
    /*echo other stuff */

    do_action(\'choose_gateway\');

    /*more other stuff */
?>

我遇到的问题正如我在上面的代码中所评论的那样。我想我必须将“add\\u action”调用移出父构造，但我不确定，如果是这样，我不知道该放在哪里，因为它仍然可以通过“do\\u action”调用使用。。。

namespace WPSE;

add_action( \'plugins_loaded\', function() {

    new Controller;
});

class Controller
{
    public function __construct()
    {
        $this->pluginVersion = \'1.5\';
        $this->pluginOptions = get_option(\'option_name\',0);
        $gateway = new Gateway( $this->pluginVersion, $this->pluginOptions );

        add_action( \'choose_gateway\', array ( $gateway, \'choose_gateway\' ) );

        $cash = new Cash( $this->pluginVersion, $this->pluginOptions );
        add_action( \'get_cash\', array ( $cash, \'get_cash\' ) );
    }
}

class Action_Handler
{
    public function __construct( $version, $options ) {}
}

class Gateway extends Action_Handler
{

    public function choose_gateway() {}
}

class Cash extends Action_Handler
{
    public function get_cash() {}
}