Cron job

// Scheduled Action Hook
function agenda_herhaling_datum_aanpassen( ) {
	edit_post_meta( $post_id 'evenement_datum', $huidigetijd . '+1 week' );
}

// Schedule Cron Job Event
function agenda_herhaling_cron() {
	if ( ! wp_next_scheduled( 'agenda_herhaling_datum_aanpassen' ) ) {
		wp_schedule_event( current_time( 'timestamp' ), 'daily', 'agenda_herhaling_datum_aanpassen' );
	}
}
add_action( 'wp', 'agenda_herhaling_cron' );