某些操作挂钩需要针对特定事件启动。请尝试以下代码：

class SpektrixPlugin {

    public function __construct(){
        add_action(\'init\', array(&$this, \'init\'));
    }

    public function spektrix_list_events($getPrices = FALSE) {
        $api = new SpektrixApiClient();
        return $api->getAllEvents($getPrices);
    }

    public function init(){
        add_action( \'spektrix_list_events\', array ( $this, \'spektrix_list_events\' ));
    }

 }

 $SpektrixEvents = new SpektrixPlugin();

class SpektrixPlugin {

    public function __construct(){
        add_action(\'init\', array(&$this, \'init\'));
    }

    public function spektrix_list_events() {
        echo \'test\';
    }

    public function init(){
        add_action( \'spektrix_list_events\', array ( $this, \'spektrix_list_events\' ));
    }

 }

 $SpektrixEvents = new SpektrixPlugin();

 //this print \'test\', so it works.
 do_action(\'spektrix_list_events\');

此函数的工作方式与apply\\u filters（）类似，只是不返回任何内容，只调用函数或方法。

所以，你应该检查apply_filters() 函数的工作方式与do_action() 但可以返回被调用方法返回的值，或查找其他实现。do_action() 不适合返回值。

usgin apply\\u过滤器示例：

class SpektrixPlugin {

    public function __construct(){
        add_action(\'init\', array(&$this, \'init\'));
    }

    public function spektrix_list_events() {
        $myvar = "Hey, I\'m works";
        return $myvar;
    }

    public function init(){
        add_filter( \'spektrix_list_events\', array ( $this, \'spektrix_list_events\' ));
    }

 }

 $SpektrixEvents = new SpektrixPlugin;

 $test = apply_filters(\'spektrix_list_events\',\'\');
 var_dump($test);

当使用类和动作时，这是一种很好的练习，请提供一种简单的方法来删除动作。

使用类似add_action( \'init\', array ( $this, \'init\' )); 可以删除此操作，但far from easy.

另一件需要考虑的事情是，如果您直接使用来自主题的插件，最好插入一些自定义过滤器和操作挂钩来自定义插件表单主题的行为。

所以，在你的情况下，你可以这样做

add_action(\'init\', \'initSpektrixPlugin\');

function initSpektrixPlugin() {
  // if the class isn\'t in the main plugin file, you can require class file here, e.g.:
  // require_once( plugin_dir_path(__FILE__) . \'inc/SpektrixPlugin.class.php\' );
  SpektrixPlugin::init();
}

class SpektrixPlugin {

    protected static $events = array();

    public static function init()
    {
        add_action( \'spektrix_list_events\', array ( __CLASS__, \'printEvents\' ) );
    }

    protected static function getEvents( $getPrices = false )
    {
        $cached = self::getCachedEvents( $getPrices );
        if ( $cached ) 
           // last \'true\' param means we are returning cached result
           return apply_filters(\'spektrix_events\', $cached, $getPrices, true);
        // requiring the api client class from here, you include it
        // only if you don\'t already have cached results
        require_once( plugin_dir_path(__FILE__) . \'SpektrixApiClient.php\' );
        $api = new SpektrixApiClient();
        $events = self::setCachedEvents( $api->getAllEvents($getPrices), $getPrices);
        // a custom action to customize behavior from theme
        do_action(\'spektrix_events_getted\', $events, $getPrices);
        // return events after a custom filter, to customize behavior from theme
        // last \'false\' param means we are returning not cached result
        return apply_filters(\'spektrix_events\', $events, $getPrices, false);
    }

    protected static function getCachedEvents( $getPrices = false )
    {
      $key = $getPrices ? 1 : 0;
      if ( isset( self::$events[$key] ) ) return self::$events[$key];
      return false;
    }

    protected static function setCachedEvents( $events, $getPrices = false )
    {
      $key = $getPrices ? 1 : 0;
      self::$events[$key] = $events;
      return $events; 
    }

    public static function printEvents( $getPrices = false )
    {
        $events = self::getEvents( $getPrices );

        // debug
        echo \'<pre>\';
        print_r($events);
        echo \'</pre><br />\';
        // end debug

        // print here your events..
        // I don\'t know if it\'s a string, an object, an array...
    }

}

<?php do_action(\'spektrix_list_events\'); ?>

<?php do_action(\'spektrix_list_events\', true); // getPrices = true ?>

如果您想让任何功能正常工作，请将其与您的适当需求挂钩。我认为在您的情况下，您希望执行函数spektrix_list_events(). 它在类中，所以在挂钩中使用数组add_action(\'appropriate hook\',array(\'SpektrixPlugin\',\'spektrix_list_events\'));希望这会有所帮助。