Dotaz: PHP dedenie premennych

[cross]

Ahojte,

som kusok zaciatocnik v PHP. V kode mam definovane taketo triedy. Mam niekde chybu, alebo v PHP sa skutocne nededia private premenne?

var=$var;
    }
}
class Klasa1 extends Klasa
{
    public function vypis()
    {
        if(isset($this->var))
            echo $this->var;
        else
            echo "Nie je";
    }

}
$pom= new Klasa1;
$pom->vypis();

?>

---

---

Odpovědi

[cross]

<?php

class Klasa

{

private $var;

public function __construct($var="lol")

{

$this->var=$var;

}

}

class Klasa1 extends Klasa

{

public function vypis()

{

if(isset($this->var))

echo $this->var;

else

echo "Nie je";

}

}

$pom= new Klasa1;

$pom->vypis();

?>

[Konqui]

http://php.net/manual/en/language.oop5.visibility.php

Class members declared public can be accessed everywhere. Members declared protected can be accessed only within the class itself and by inherited and parent classes. Members declared as private may only be accessed by the class that defines the member.

[Konqui]

A to ze jsi zacatecnik ti brani precist si zakladni ucebnici jazyka? Privatni promenna je soukroma proto, ze neni pristupna odjinud nez ze tridy, ve ktere je deklarovana. Tak to ma vic objektovych jazyku. Jestli ji chces mit pristupnou v potomcich, deklaruj ji jako protected nebo public (nedoporucene).