ReflectionProperty::getDefaultValue

(PHP 8)

ReflectionProperty::getDefaultValue — Returns the default value declared for a property

Açıklama

public function ReflectionProperty::getDefaultValue(): mixed

Gets the implicit or explicitly declared default value for a property.

Bağımsız Değişkenler

Bu işlevin bağımsız değişkeni yoktur.

Dönen Değerler

The default value if the property has any default value (including null). If there is no default value, then null is returned. It is not possible to differentiate between a null default value and an uninitialized typed property. Use ReflectionProperty::hasDefaultValue() to detect the difference.

Sürüm Bilgisi

Sürüm:	Açıklama
8.5.0	Calling ReflectionProperty::getDefaultValue() for properties without default values has been deprecated.

Örnekler

Örnek 1 ReflectionProperty::getDefaultValue() example

<?php
class Foo {
    public $bar = 1;
    public ?int $baz;
    public int $boing = 0;
    public function __construct(public string $bak = "default") { }
}

$ro = new ReflectionClass(Foo::class);
var_dump($ro->getProperty('bar')->getDefaultValue());
var_dump($ro->getProperty('baz')->getDefaultValue());
var_dump($ro->getProperty('boing')->getDefaultValue());
var_dump($ro->getProperty('bak')->getDefaultValue());
?>

Yukarıdaki örneğin çıktısı:

int(1)
NULL
int(0)
NULL

Ayrıca Bakınız

ReflectionProperty::hasDefaultValue() - Checks if property has a default value declared

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User Contributed Notes 1 note

down

rwalker dot php at gmail dot com ¶

5 years ago

An equivalent for PHP 7:

<?php
$reflectionProperty = new \ReflectionProperty(Foo::class, 'bar');

//PHP 8:
$defaultValue = $reflectionProperty->getDefaultValue();

//PHP 7:
$defaultValue = $reflectionProperty->getDeclaringClass()->getDefaultProperties()['bar'] ?? null;
?>

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