POO

Biycle.php

<?php
class Bicycle
{
    private $color;
    private $nbWheels = 2;
    private $nbSeats = 1;
    private $currentSpeed = 10;

    public function __contruct(string $color, int $nbSeats)
    {
        $this->color = $color;
        $this->nbSeats = $nbSeats;
    }

    public function setColor(string $color): string
    {
        $this->color= $color;
        return $this;
    }

    public function setnbSeats(string $nbSeats): int
    {
         $this->nbSeats = $nbSeats;
         return $this;
    }

    public function forward() : string
    {
        $this->currentSpeed = 15;
        return "Go !";
    }

    public function brake(): string
    {
        $sentence = "";
        while ($this->currentSpeed > 0) {
            $this->currentSpeed --;
            $sentence .= "Brake !!!";
        }
        $sentence .= "I'm stopped !";
        return $sentence;
    }

    public function setCurrentSpeed(int $currentSpeed): int
    {
      if ($currentSpeed >= 0){
          $this->currentSpeed = $currentSpeed;
      }
    }

    public function getCurrentSpeed() : int
    {
     return $this->currentSpeed;
    }

    public function setnbWheels(string $nbWheels): string
    {
       $this->nbWheels = $nbWheels;
       return $this;
    }

    public function getnbWheels(): int
    {
      return $this->nbWheels;
    }
}


Car.php

<?php
class Car
{
    private $color;
    private $nbWheels;
    private $nbSeats;
    private $currentSpeed = 30;

    public function __contruct(string $color, int $nbSeats)
    {
        $this->color = $color;
        $this->nbSeats = $nbSeats;
    }

    public function forward() : void
    {
        $this->currentSpeed > 0;
        return "Go !";
    }

    public function brake(): void
    {
        $sentence = "";
        while ($this->currentSpeed > 0) {
            $this->currentSpeed --;
            $sentence .= "Brake !!!";
        }
        $sentence .= "I'm stopped !";
        return $sentence;
    }

    private function setColor(string $color): string
    {
        $this->color= $color;

        return $this;
    }

    private function getColor() : string
    {
        return $this->color;
    }

    public function setnbWheels(string $nbWheels) : string
    {
       $this->nbWheels = $nbWheels;
       return $this;
    }

    private function getnbWheels() : int
    {
        return $this->nbWheels;
    }

    private function setnbSeats(string $nbSeats) : string
    {
        $this->nbSeats = $nbSeats;
        return $this;
    }

    private function getnbSeats() : int
    {
       return $this->nbseats;
    }

    private function setCurrentSpeed(int $currentSpeed) : string
    {
      if ($currentSpeed >= 0){
          $this->currentSpeed = $currentSpeed;
      }
    }

    private function getCurrentSpeed(): int
    {
     return $this->currentSpeed;
    }
}