具有：

插件名称。php

// If this file is called directly, abort.
if ( ! defined( \'ABSPATH\' ) ) {
    die();
}

define(\'PLUGINNAME_PLUGIN_URL\', plugin_dir_url( __FILE__ ));
define(\'PLUGINNAME_PLUGIN_DIR\', plugin_dir_path(__FILE__));

require_once( plugin_dir_path( __FILE__ ) . \'class-pluginname.php\' );

// Register hooks that are fired when the plugin is activated, deactivated, and uninstalled, respectively.
register_activation_hook( __FILE__, array( \'PluginName\', \'activate\' ) );
register_deactivation_hook( __FILE__, array( \'PluginName\', \'deactivate\' ) );

PluginName::get_instance();

类插件名称。php

    /**
     * Initialize the plugin
     *
     * @since     1.0.0
     */
    private function __construct()
    {
        #add_action(\'init\', array($this, \'widget_add_vars\'));

        #add_action(\'params\', array($this, \'catch_widget_query\'));
         add_action(\'dailyExport\', array($this, \'_generateJson\'));

         if (!wp_next_scheduled(\'dailyExport\')) {
             wp_schedule_event( time(), \'daily\', \'dailyExport\' );
         }
    }

    /**
     * Return an instance of this class.
     *
     * @since     1.0.0
     *
     * @return    object    A single instance of this class.
     */
    public static function get_instance()
    {
        // If the single instance hasn\'t been set, set it now.
        if ( null == self::$instance )
            self::$instance = new self;

        return self::$instance;
    }

    /**
     * Fired when the plugin is activated.
     *
     * @since    1.0.0
     */
    public static function activate()
    {
        self::_generateJson();
        wp_schedule_event(time(), \'daily\', \'dailyExport\');
    }

    /**
     * Fired when the plugin is deactivated.
     *
     * @since    1.0.0
     */
    public static function deactivate()
    {
        wp_clear_scheduled_hook(\'dailyExport\');
    }

    public function dailyExport()
    {
        return self::_generateJson();
    }

我想知道，你是否认为static 这个activate 和deactivate 函数，如果您认为我正确地处理了cron事件，则可以安排每日事件。

我写了我的插件，基于这个模板https://github.com/tommcfarlin/WordPress-Plugin-Boilerplate

if (!wp_next_scheduled(\'dailyExport\')) { 
    //schedule event 
    wp_schedule_event( time(), \'daily\', \'dailyExport\' );
}

register_activation_hook(__FILE__, array( \'Killa\', \'activated\' ) );
register_deactivation_hook( __FILE__, array( \'Killa\', \'deactivated\' ) );

add_action(\'plugins_loaded\', array ( Killa::get_instance(), \'plugin_setup\' ) );

class Killa
{
    protected static $instance = NULL;
    public static function get_instance()
    {
        if ( null === self::$instance )
        {
            self::$instance = new self;
            self::load_files();
        }
        return self::$instance; 
    }

    public function plugin_setup()
    {
        add_action(\'my_cron_event\', array($this, \'my_callback_function\'));     
    }

    public function __construct()
    {
        //empty
    } 

    public static function activated() 
    {
        wp_schedule_event( time(), \'hourly\', \'my_cron_event\');
    }

    public static function deactivated() 
    {
        wp_clear_scheduled_hook( \'my_cron_event\' );
    }

    public function my_callback_function()
    {
       //do your thing here... such as generate JSON
    }
}