3v4l.org

run code in 500+ PHP versions simultaneously
<?php class ReadonlyWakeup { public function __construct(public readonly string $value) {} public function __wakeup(): void { $this->value = 'set on wakeup'; } } $obj = new ReadonlyWakeup('test'); $serialized = serialize($obj); $unserialized = unserialize($serialized); print $unserialized->value;
Output for 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Fatal error: Uncaught Error: Cannot modify readonly property ReadonlyWakeup::$value in /in/OPTLj:7 Stack trace: #0 [internal function]: ReadonlyWakeup->__wakeup() #1 /in/OPTLj(13): unserialize('O:14:"ReadonlyW...') #2 {main} thrown in /in/OPTLj on line 7
Process exited with code 255.
preferences:
57.41 ms | 716 KiB | 4 Q