Show time slot of pikcup now or deliver now or asap

pickup-now-delivery-now-asap.php

add_filter('pisol_dtt_time_slot_filter', 'addingAsap',10,2);
add_filter('pisol_dtt_time_range_filter', 'addingAsap',10,2);
function addingAsap($slot, $date){
	$today = current_time('Y/m/d');
	
	if($today === $date && !empty($slot)){
		$type = pi_dtt_delivery_type::getType();
		if($type === 'delivery'){
			$msg = 'Deliver now';
		}else{
			$msg = 'Pickup now';
		}
		$top = array(array('id'=>$msg, 'text'=>$msg));
		$slot = array_merge($top, $slot);
	}
	return $slot;
}