Php/docs/reflectionproperty.getdefaultvalue

• PHP Manual
• ReflectionProperty
• Returns the default value declared for a property

ReflectionProperty::getDefaultValue

(PHP 8)

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

说明

public ReflectionProperty::getDefaultValue ( ) : mixed

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

参数

此函数没有参数。

返回值

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.

范例

Example #1 ReflectionClass::getDefaultValue() example

<?phpclass 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());?>

以上例程会输出：

int(1)
NULL
int(0)

参见

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