Online PHP editor | output for Zbnqa

@ 2024-09-04T22:40:38Z

<?php

class ParentClass
{
    protected readonly int $value;
}

trait Foo
{
    protected readonly int $value;
}

class ChildClassWithoutTrait extends ParentClass
{
    protected readonly int $value;
}

$reflector = new ReflectionClass(ChildClassWithoutTrait::class);
$instance = $reflector->newInstanceWithoutConstructor();

var_dump(
    $reflector->hasProperty('value'),
    $prop = $reflector->getProperty('value')
);

$prop->setValue($instance, 20);

var_dump($instance);

echo '--------------------------------------------------------------------------------------------------------', PHP_EOL;

class ClassWithTraitAndNoParent
{
    use Foo;
}

$reflector = new ReflectionClass(ClassWithTraitAndNoParent::class);
$instance = $reflector->newInstanceWithoutConstructor();

var_dump(
    $reflector->hasProperty('value'),
    $prop = $reflector->getProperty('value')
);

$prop->setValue($instance, 20);

var_dump($instance);

echo '--------------------------------------------------------------------------------------------------------', PHP_EOL;

class ChildClassWithTrait extends ParentClass
{
    use Foo;
}

$reflector = new ReflectionClass(ChildClassWithTrait::class);
$instance = $reflector->newInstanceWithoutConstructor();

var_dump(
    $reflector->hasProperty('value'),
    $prop = $reflector->getProperty('value')
);

$prop->setValue($instance, 20);

var_dump($instance);

Output for 8.4.1 - 8.4.12: bool(true) object(ReflectionProperty)#3 (2) { ["name"]=> string(5) "value" ["class"]=> string(22) "ChildClassWithoutTrait" } object(ChildClassWithoutTrait)#2 (1) { ["value":protected]=> int(20) } -------------------------------------------------------------------------------------------------------- bool(true) object(ReflectionProperty)#2 (2) { ["name"]=> string(5) "value" ["class"]=> string(25) "ClassWithTraitAndNoParent" } object(ClassWithTraitAndNoParent)#1 (1) { ["value":protected]=> int(20) } -------------------------------------------------------------------------------------------------------- bool(true) object(ReflectionProperty)#1 (2) { ["name"]=> string(5) "value" ["class"]=> string(11) "ParentClass" } object(ChildClassWithTrait)#4 (1) { ["value":protected]=> int(20) }
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25: bool(true) object(ReflectionProperty)#3 (2) { ["name"]=> string(5) "value" ["class"]=> string(22) "ChildClassWithoutTrait" } object(ChildClassWithoutTrait)#2 (1) { ["value":protected]=> int(20) } -------------------------------------------------------------------------------------------------------- bool(true) object(ReflectionProperty)#2 (2) { ["name"]=> string(5) "value" ["class"]=> string(25) "ClassWithTraitAndNoParent" } object(ClassWithTraitAndNoParent)#1 (1) { ["value":protected]=> int(20) } -------------------------------------------------------------------------------------------------------- bool(true) object(ReflectionProperty)#1 (2) { ["name"]=> string(5) "value" ["class"]=> string(11) "ParentClass" } Fatal error: Uncaught Error: Cannot initialize readonly property ParentClass::$value from scope ChildClassWithTrait in /in/Zbnqa:64 Stack trace: #0 /in/Zbnqa(64): ReflectionProperty->setValue(Object(ChildClassWithTrait), 20) #1 {main} thrown in /in/Zbnqa on line 64
Process exited with code 255.

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