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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 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
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.
Output for 7.4.0 - 7.4.33
Parse error: syntax error, unexpected 'public' (T_PUBLIC), expecting variable (T_VARIABLE) in /in/kkf24 on line 8
Process exited with code 255.
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