(PHP 8)
ReflectionProperty::getAttributes — Gets Attributes
$name = null, int $flags = 0): arrayReturns all attributes declared on this class property as an array of ReflectionAttribute.
name过滤结果，匹配此类名，仅包含 ReflectionAttribute 实例的属性。
flags
如果提供了 name，则用于确定如何过滤结果的 flag。
默认值为 0，这将导致返回的结果只属于类 name 的属性。
唯一可用的其他选项是使用 ReflectionAttribute::IS_INSTANCEOF，它将改为使用 instanceof 进行过滤。
Array of attributes, as a ReflectionAttribute object.
示例 #1 Basic usage
<?php
#[Attribute]
class Fruit {
}
#[Attribute]
class Red {
}
class Basket {
#[Fruit]
#[Red]
public string $apple = 'apple';
}
$property = new ReflectionProperty('Basket', 'apple');
$attributes = $property->getAttributes();
print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
?>以上示例会输出：
Array
(
[0] => Fruit
[1] => Red
)
示例 #2 Filtering results by class name
<?php
#[Attribute]
class Fruit {
}
#[Attribute]
class Red {
}
class Basket {
#[Fruit]
#[Red]
public string $apple = 'apple';
}
$property = new ReflectionProperty('Basket', 'apple');
$attributes = $property->getAttributes('Fruit');
print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
?>以上示例会输出：
Array
(
[0] => Fruit
)
示例 #3 Filtering results by class name, with inheritance
<?php
interface Color {
}
#[Attribute]
class Fruit {
}
#[Attribute]
class Red implements Color {
}
class Basket {
#[Fruit]
#[Red]
public string $apple = 'apple';
}
$property = new ReflectionProperty('Basket', 'apple');
$attributes = $property->getAttributes('Color', ReflectionAttribute::IS_INSTANCEOF);
print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
?>以上示例会输出：
Array
(
[0] => Red
)