ReflectionProperty::getAttributes
(PHP 8)
ReflectionProperty::getAttributes — Gets Attributes
说明
Returns all attributes declared on this class property as an array of ReflectionAttribute.
参数
- 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。
返回值
Array of attributes, as a ReflectionAttribute object.
示例
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
)
参见
- ReflectionClass::getAttributes() - 获取所有属性
- ReflectionClassConstant::getAttributes() - Gets Attributes
- ReflectionFunctionAbstract::getAttributes() - Gets Attributes
- ReflectionParameter::getAttributes() - Gets Attributes
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