Mbinu __set_state

Mbinu __set_state ni tuli na huitwa kiotomatiki unapotumia kitendo var_export kwenye kitu. Inapaswa kurudisha mfano mpya wa darasa lenye sifa zilizorejeshwa. Mbinu hii ni muhimu kwa usinisabiti na utatuzi wa vitu.

Sintaksia

public static function __set_state(array $properties): object

Mfano

Tutengeneze darasa na kutekeleza ndani yake mbinu __set_state:

<?php
class MyClass {
	public $prop1;
	public $prop2;
	
	public function __construct($val1, $val2) {
		$this->prop1 = $val1;
		$this->prop2 = $val2;
	}
	
	public static function __set_state($array) {
		return new self($array['prop1'], $array['prop2']);
	}
}

$obj = new MyClass('a', 'b');
$exported = var_export($obj, true);
eval('$newObj = ' . $exported . ';');

var_dump($newObj);
?>

Matokeo ya utekelezaji wa kodi:

object(MyClass)#2 (2) {
	["prop1"]=> string(1) "a"
	["prop2"]=> string(1) "b"
}

Mfano

Matumizi ya __set_state kwa sifa za kibinafsi:

<?php
class PrivateClass {
	private $secret;
	
	public function __construct($value) {
		$this->secret = $value;
	}
	
	public static function __set_state($array) {
		$obj = new self($array['secret']);
		return $obj;
	}
}

$privateObj = new PrivateClass('12345');
$exported = var_export($privateObj, true);
eval('$newPrivateObj = ' . $exported . ';');

var_dump($newPrivateObj);
?>

Matokeo ya utekelezaji wa kodi:

object(PrivateClass)#2 (1) {
	["secret":"PrivateClass":private]=> string(5) "12345"
}

Angalia Pia

kitendo var_export,
kinachosafirisha tofauti kwenye mstari
mbinu __sleep,
inayoitwa kabla ya usinisabiti wa kitu
mbinu __wakeup,
inayoitwa wakati wa utatuzi wa kitu