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(PHP 8)
ReflectionClass::getAttributes — Gets Attributes
$name = null, int $flags = 0): array
Returns all attributes declared on this class as an array of ReflectionAttribute.
name
Filter the results to include only ReflectionAttribute instances for attributes matching this class name.
flags
Flags for determining how to filter the results, if name
is provided.
Default is 0 which will only return results for attributes that
are of the class name.
The only other option available, is to use ReflectionAttribute::IS_INSTANCEOF,
which will instead use instanceof for filtering.
Array of attributes, as a ReflectionAttribute object.
示例 #1 Basic usage
<?php
#[Attribute]
class Fruit {
}
#[Attribute]
class Red {
}
#[Fruit]
#[Red]
class Apple {
}
$class = new ReflectionClass('Apple');
$attributes = $class->getAttributes();
print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
?>
以上例程会输出：
Array
(
[0] => Fruit
[1] => Red
)
示例 #2 Filtering results by class name
<?php
#[Attribute]
class Fruit {
}
#[Attribute]
class Red {
}
#[Fruit]
#[Red]
class Apple {
}
$class = new ReflectionClass('Apple');
$attributes = $class->getAttributes('Fruit');
print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
?>
以上例程会输出：
Array
(
[0] => Fruit
)
示例 #3 Filtering results by class name, with inheritance
<?php
interface Color {
}
#[Attribute]
class Fruit {
}
#[Attribute]
class Red implements Color {
}
#[Fruit]
#[Red]
class Apple {
}
$class = new ReflectionClass('Apple');
$attributes = $class->getAttributes(Color::class, ReflectionAttribute::IS_INSTANCEOF);
print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
?>
以上例程会输出：
Array
(
[0] => Red
)
