<?php declare(strict_types=1); namespace Faker\Core; use Faker\Extension; /** * @experimental This class is experimental and does not fall under our BC promise */ final class Blood implements Extension\BloodExtension { /** * @var string[] */ private array $bloodTypes = ['A', 'AB', 'B', 'O']; /** * @var string[] */ private array $bloodRhFactors = ['+', '-']; public function bloodType(): string { return Extension\Helper::randomElement($this->bloodTypes); } public function bloodRh(): string { return Extension\Helper::randomElement($this->bloodRhFactors); } public function bloodGroup(): string { return sprintf( '%s%s', $this->bloodType(), $this->bloodRh(), ); } }