(PHP 8)
ReflectionProperty::getDefaultValue — Returns the default value declared for a property
Gets the implicit or explicitly declared default value for a property.
У цієї функції немає параметрів.
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 ReflectionProperty::hasDefaultValue() to detect the difference.
Приклад #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());
?>Поданий вище приклад виведе:
int(1) NULL int(0) NULL
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;
?>