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#[\Attribute] validation should error on trait/interface/enum/abstract class #19153
Description
Description
<?php
#[Attribute]
enum DemoEnum {}
#[Attribute]
trait DemoTrait {}
#[Attribute]
abstract class DemoAbstract {}
#[Attribute]
interface DemoInterface {}
#[DemoEnum]
#[DemoTrait]
#[DemoAbstract]
#[DemoInterface]
function usesWrongAttrib() {}
$r = new ReflectionFunction( 'usesWrongAttrib' );
$a = $r->getAttributes();
var_dump( $a );
foreach ( $a as $attrib ) {
try {
$attrib->newInstance();
} catch ( Error $e ) {
echo get_class( $e ) . ": " . $e->getMessage() . "\n";
}
}currently outputs
array(4) {
[0]=>
object(ReflectionAttribute)#2 (1) {
["name"]=>
string(8) "DemoEnum"
}
[1]=>
object(ReflectionAttribute)#3 (1) {
["name"]=>
string(9) "DemoTrait"
}
[2]=>
object(ReflectionAttribute)#4 (1) {
["name"]=>
string(12) "DemoAbstract"
}
[3]=>
object(ReflectionAttribute)#5 (1) {
["name"]=>
string(13) "DemoInterface"
}
}
Error: Cannot instantiate enum DemoEnum
Error: Cannot instantiate trait DemoTrait
Error: Cannot instantiate abstract class DemoAbstract
Error: Cannot instantiate interface DemoInterface
But we should have compile-time errors instead.
Activity
DanielEScherzer commentedon Jul 16, 2025
Cross link #15731 which had similar reasoning
[-]Attribute validation should error on trait/interface/enum/abstract class[/-][+]#[\Attribute] validation should error on trait/interface/enum/abstract class[/+]phpGH-19153: Validate #[\Attribute] targets
GH-19153: Validate `#[\Attribute]` targets (#19154)