Checkbox limits per post type in admin

• nguyenrom

• February 17, 2020 at 6:41 pm

I have tried to setup checkbox limits per post type, it’s working but the $valid doesn’t show the noti if the limits are reached.

add_filter('acf/validate_value/name=specialty', 'only_allow_checkbox', 20, 4);

function only_allow_checkbox($valid, $value, $field, $input) {
	
	if( !$valid ) {
		return $valid;
	}

	$screen = get_current_screen();
	if (count($value) > 3 && ($screen->post_type == 'technology') ) {
		$valid = 'Only Select 3';
	} else if (count($value) > 2) {
		$valid = 'Only Select 2';
	
	}
	  
	return $valid;
}

I need your help, thank you so much!