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<?php declare(strict_types=1); final class A { public function __construct( public string $a = 'default', ) { } } $property = new ReflectionProperty(A::class, 'a'); var_dump($property->hasDefaultValue()); $parameter = new ReflectionParameter([A::class, '__construct'], 'a'); var_dump($parameter->isDefaultValueAvailable()); $class = new ReflectionClass(A::class); $a = $class->newInstanceWithoutConstructor(); var_dump($a->a);
Output for git.master, git.master_jit, rfc.property-hooks
bool(false) bool(true) Fatal error: Uncaught Error: Typed property A::$a must not be accessed before initialization in /in/kkf24:21 Stack trace: #0 {main} thrown in /in/kkf24 on line 21
Process exited with code 255.

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