Php/docs/reflectionproperty.hasdefaultvalue
ReflectionProperty::hasDefaultValue
(PHP 8)
ReflectionProperty::hasDefaultValue — Checks if property has a default value declared
说明
public ReflectionProperty::hasDefaultValue ( ) : bool
Checks whether the property was declared with a default value, including an implicit
null
default value. Only returns false
for typed properties without default value (or
dynamic properties).
参数
此函数没有参数。
返回值
If the property has any default value (including null
) true
is returned;
if the property is typed without a default value declared or is a dynamic property, false
is returned.
范例
Example #1 ReflectionClass::hasDefaultValue() example
<?phpclass Foo { public $bar; public ?int $baz; public int $boing;}$ro = new ReflectionClass(Foo::class);var_dump($ro->getProperty('bar')->hasDefaultValue());var_dump($ro->getProperty('baz')->hasDefaultValue());var_dump($ro->getProperty('boing')->hasDefaultValue());?>
以上例程会输出:
bool(true) bool(false) bool(false)