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ReflectionProperty::getDefaultValue

(PHP 8)

ReflectionProperty::getDefaultValueReturns the default value declared for a property

Descrierea

public ReflectionProperty::getDefaultValue ( ) : mixed

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

Parametri

Această funcție nu are parametri.

Valorile întoarse

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 unitialized typed property. Use ReflectionClass::hasDefaultValue() to detect the difference.

Exemple

Example #1 ReflectionClass::getDefaultValue() example

<?php
class Foo {
    public 
$bar 1;
    public ?
int $baz;
    public 
int $boing 0;
}

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

Exemplul de mai sus va afișa:

int(1)
NULL
int(0)

A se vedea și

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User Contributed Notes 1 note

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rwalker dot php at gmail dot com
5 months 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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