Njia ya kichawi __set
Njia ya kichawi __set inaitwa kiotomatiki inapojaribu kupeana thamani kwa sifa ambayo haipo au haipatikani katika muktadha wa sasa. Njia huchukua vigezo viwili: jina la sifa na thamani inayojaribu kupeanwa.
Syntax
public function __set(string $name, mixed $value): void
Mfano
Wacha tuunde darasa ambalo litatumia __set kukamata majaribio ya kuweka sifa zisizopo:
<?php
class User {
private $data = [];
public function __set($name, $value) {
$this->data[$name] = $value;
}
public function getData() {
return $this->data;
}
}
$user = new User();
$user->email = 'test@example.com';
$user->age = 25;
print_r($user->getData());
?>
Matokeo ya utekelezaji wa kificho:
Array
(
[email] => test@example.com
[age] => 25
)
Mfano
Matumizi ya __set kuthibitisha data kabla ya kuweka:
<?php
class Product {
private $price;
public function __set($name, $value) {
if ($name === 'price') {
if (!is_numeric($value) || $value < 0) {
throw new Exception('Thamani batili ya bei');
}
$this->price = $value;
}
}
public function getPrice() {
return $this->price;
}
}
$product = new Product();
$product->price = 100;
echo $product->getPrice();
?>
Matokeo ya utekelezaji wa kificho:
100
