(PHP 8)
ReflectionClass::getAttributes — Gets Attributes
$name = null, int $flags = 0): arrayReturns all attributes declared on this class as an array of ReflectionAttribute.
nameFilter 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));
?>
以上例程會(huì )輸出：
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));
?>
以上例程會(huì )輸出：
Array
(
[0] => Fruit
)
示例 #3 Filtering results by class name, with inheritance
<?php
interface Color {
}
#[Attribute]
class Fruit {
}
#[Attribute]
class Red implements Colour {
}
#[Fruit]
#[Red]
class Apple {
}
$class = new ReflectionClass('Apple');
$attributes = $class->getAttributes('Colour', ReflectionAttribute::IS_INSTANCEOF);
print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
?>
以上例程會(huì )輸出：
Array
(
[0] => Red
)