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

phppublic function __set(string $name, mixed $value): void

Mfano

Wacha tuunde darasa ambalo litatumia __set kukamata majaribio ya kuweka sifa zisizopo:

php<?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:

phpArray
(
  [email] => test@example.com
  [age] => 25
)

Mfano

Matumizi ya __set kuthibitisha data kabla ya kuweka:

php<?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:

php100

Angalia pia