PHP somo la 61: jinsi ya kufanya loop kwenye class kw akutumia foreach loop

Iteration  ni uwezo wa kuifanya value yeyote iweze kufanyiwa loop kw akutumia foreach(), 

<?php

function printIterable( $myIterable) {

   foreach($myIterable as $item) {

       echo $item;

   }

}

$arr = ["a", "b", "c"];

printIterable($arr);

?>

 Code hizo hapo juu pia zinaweza kuandikwa katika mtindo huu

<?php

function getIterable() {

   return ["a", "b", "c"];

}

$myIterable = getIterable();

foreach($myIterable as $item) {

   echo $item;

}

?>

Sasa ngoja tuone kwenye class

Mfano
<?php

class IterableCollection {
    private $items;

    public function __construct() {
        $this->items = ["a", "b", "c"];
    }

    public function getItems() {
        return $this->items;
    }
}

$iterableCollection = new IterableCollection();
$items = $iterableCollection->getItems();

foreach($items as $item) {
    echo $item;
}

?>

Mfano mwingine:

Katika mfano huu utajifunza jinsi ya kukokotia factorial of number. 

<?php

class FactorialCalculator {

    private $number;

    public function __construct($number) {

        $this->number = $number;

    }

    public function calculate() {

        $result = 1;

        $numbers = range(1, $this->number);

        foreach($numbers as $num) {

            $result *= $num;

        }

        return $result;

    }