OOP

//Class cars

<?php

class Car{
    private $mark;
    private $model;
    private $year;
    private $engine;

    public function __construct($mk,$models,$years,$theengen) {
        $this->mark=$mk;
        $this->model=$models;
        $this->year=$years;
        $this->engine=$theengen;
    }

    public function getMark(){
        return $this->mark;
    }

    public function getModel(){
        return $this->model;
    }

    public function getYear(){
        return $this->year;
    }

    public function getEngen(){
        return $this->engine;
    }

    public function printCars(){
        echo "Your car is {$this->mark} model {$this->model} production yera "
        . "{$this->year} with size on the engien {$this->engine}cc".'<br>';
    }
}
if($hidden == 1){
    $newcar = new Car($mark,$model,$year,$engine);
    $newcar->printCars();
}
?>


//Form for cars___________________________________________________________________|


<form action="formForCars.php" method="post">
    <div>Input your's car...</div>
    <input type="hidden" name="hidden" value="1">
    Mark:<input type="text" name="mark">
    Model:<input type="text" name="model">
    Year:<input type="text" name="year">
    Engine:<input type="text" name="engine">
    <input type="submit" value="Submit">
</form>
<?php
if(isset($_POST['mark'])
        || isset($_POST['model'])
        || isset($_POST['year'])
        || isset($_POST['engine'])
        || isset($_POST['hidden'])){

    $mark = trim($_POST['mark']);
    $model = trim($_POST['model']);
    $year = trim($_POST['year']);
    $engine = trim($_POST['engine']);
    $hidden = trim($_POST['hidden']);


            if(strlen($mark)>=2 && strlen($mark)>=2 && strlen($mark)>=2 && strlen($mark)>=2 ){
                include 'cars.php';
            }
                else {
                     echo '<div style="color:red">'.'FAILURE!'.'</div>';
            }
        }
?>
//User calss__________________________|

<?php
class User{
    protected $firstname;
    protected $lastyname;
    protected $age;
    protected $profilpic;
    protected $sex;
    protected $password;
    protected $squestion;
    protected $sanswer;
    protected $email;

    function __construct($firstname, $lastyname, $age, $profilpic, $sex, $password, $squestion, $sanswer, $email) {
        $this->firstname = $firstname;
        $this->lastyname = $lastyname;
        $this->age       = $age;
        $this->profilpic = $profilpic;
        $this->sex       = $sex;
        $this->password  = $password;
        $this->squestion = $squestion;
        $this->sanswer   = $sanswer;
        $this->email     = $email;
    }

    public function printForm(){
        $printData = "Name:{$this->firstname}:LastName:{$this->lastyname}:"
        . "Age:{$this->age}:Picture:{$this->profilpic}:Sex:{$this->sex}:"
        . "Password:{$this->password}:Question:{$this->squestion}:"
        . "Answer:{$this->sanswer}:Email:{$this->email}:";
        file_put_contents('userdata.txt', $printData."\n",FILE_APPEND);
    }

}

class Workman extends User{
    protected $profession;
    protected $payment;

    function __construct($profession, $payment) {
        $this->profession = $profession;
        $this->payment    = $payment;
    }

    public function printForm(){
        $printData = "Profession:{$this->profession}:"
        . "Payment{$this->payment}:";
        file_put_contents('userdata.txt', $printData."\n",FILE_APPEND);
    }
}



if($hidden==1){
    $file=1;
    $users=new User($firstname,$lastname,$age,$file,$sex,$pass,$question,$answer,$email);
    $extend=new Workman($pro, $pay);
    $users->printForm();
    $extend->printForm();
}
?>

//Form for user_________________________|



<form action="formForUser.php" method="post" accept-charset=""enctype="multipart/form-data">
    <input type="hidden" name="submitForm" value="1">
    First name:<input type="text" name="firstname"></br>
    Last name:<input type="text" name="lastname"></br>
    Age:<input type="text" name="age"></br>
    Password:<input type="password" name="pass"></br>
    Security question:<input type="text" name="question"></br>
    Security answer:<input type="text" name="answer"></br>
    Email:<input type="email" name="email"></br>
    sex:
        male:<input type="radio" name="sex" value="male" class="male">
        female:<input type="radio" name="sex" value="female" class="female"></br>
    Picture:<input type="file" name="file" id="file"></br>
    Profession:<input type="text" name="pro"></br>
    Payment:<input type="text" name="pay"></br>
    <input type="submit" value="Submit">
</form>
<?php

if(isset($_POST['firstname'])
        || isset($_POST['lastname'])
        || isset($_POST['age'])
        || isset($_POST['pass'])
        || isset($_POST['question'])
        || isset($_POST['answer'])
        || isset($_POST['email'])
        || isset($_POST['submitForm'])
        || isset($_POST['sex'])
        || isset($_FILES["file"]["error"])
        || isset($_POST['pro'])
        || isset($_POST['pay'])){

    $firstname = trim($_POST['firstname']);
    $lastname = trim($_POST['lastname']);
    $age = trim($_POST['age']);
    $pass = trim($_POST['pass']);
    $question = trim($_POST['question']);
    $answer = trim($_POST['answer']);
    $email = trim($_POST['email']);
    $sex = trim($_POST['sex']);
    $hidden = trim($_POST['submitForm']);
    $file = trim($_FILES["file"]["error"]);
    $pro = trim($_POST['pro']);
    $pay = trim($_POST['pay']);
    include 'userClass.php';

            if ($_FILES["file"]["error"] > 0)
        {
            echo "Error: " . $_FILES["file"]["error"] . "<br>";
        }
        else {
              echo "Upload: " . $_FILES["file"]["name"] . "<br>";
              echo "Type: " . $_FILES["file"]["type"] . "<br>";
              echo "Size: " . ($_FILES["file"]["size"] / 1024) . " kB<br>";
              echo "Stored in: " . $_FILES["file"]["tmp_name"];

              }

}

?>