Take the 2-minute tour ×
WordPress Development Stack Exchange is a question and answer site for WordPress developers and administrators. It's 100% free, no registration required.

Scenario 1: fails

Adding a cron task wp_schedule_event with a custom interval on plugin activation using register_activation_hook outside the class definition fails to work because the custom interval is not recognized yet;

register_activation_hook(__FILE__, array('Test', 'test_plugin_activated' ) );
register_deactivation_hook(__FILE__, array('Test', 'test_plugin_deactivated' ) );  
add_action('plugins_loaded', array ( Test::get_instance(), 'plugin_setup' ) );

 class Test 
 {

    protected static $instance = NULL;

    public static function get_instance()
    {

        if ( null === self::$instance )
        {
            self::$instance = new self;
        }
        return self::$instance; 

    }

    public function plugin_setup()
    {
        //init stuff...        
    }

    public function __construct() 
    {
        add_filter( 'cron_schedules', array($this, 'custom_cron_schedule') );
    }

    public function custom_cron_schedule( $schedules ) 
    {
       $schedules['minute'] = array(
        'interval' => 60, 
        'display' => __( 'Once per minute' )
       );
       return $schedules;
    } 

    public static function test_plugin_activated() 
    {
        wp_schedule_event( time(), 'minute', 'MINUTE_EVENT') ;
    }

    public static function test_plugin_deactivated() 
    {
        wp_clear_scheduled_hook( 'MINUTE_EVENT' );
    }

}

Scenario 2: fails

Adding a cron task with wp_schedule_event with a custom interval on plugin activation using register_activation_hook inside the class constructor does work because the call to the add_filter('cron_schedules', ...); is also fired in the chain of events.

add_action('plugins_loaded', array ( Test::get_instance(), 'plugin_setup' ) );

 class Test 
 {

    protected static $instance = NULL;

    public static function get_instance()
    {

        if ( null === self::$instance )
        {
            self::$instance = new self;
        }
        return self::$instance; 

    }

    public function plugin_setup()
    {
        //init stuff...        
    }

    public function __construct() 
    {
        register_activation_hook(__FILE__, array($this, 'test_plugin_activated' ) );
        register_deactivation_hook(__FILE__, array($this, 'test_plugin_deactivated' ) ); 
        add_filter( 'cron_schedules', array($this, 'custom_cron_schedule') );
    }

    public function custom_cron_schedule( $schedules ) 
    {
       $schedules['minute'] = array(
        'interval' => 60, 
        'display' => __( 'Once per minute' )
       );
       return $schedules;
    } 

    public function test_plugin_activated() 
    {
        wp_schedule_event( time(), 'minute', 'MINUTE_EVENT') ;
    }

    public function test_plugin_deactivated() 
    {
        wp_clear_scheduled_hook( 'MINUTE_EVENT' );
    }

} 

Question

How can I get scenario 1 or 2 to work successfully with a custom time interval.

Edit:

Both scenarios fail with a custom interval time, other than the default inbuilt intervals.

share|improve this question

1 Answer 1

up vote 0 down vote accepted

So as we discussed this in chat, there was one (wired) thing:

The hook name must not(!) contain underscores.

To keep yourself on the save side of life, better lower case it as well.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.