- var_dump: documentation ( source)
- array_keys: documentation ( source)
<?php
#[\Attribute]
final class Attr1 {}
#[\Attribute]
final class Attr2 {}
final class A
{
public function __construct(
#[Attr1]
#[Attr2]
public string $a
) {}
}
$reflection = new \ReflectionClass(A::class);
var_dump(array_keys($reflection->getConstructor()->getParameters()[0]->getAttributes(Attr2::class)));